Kconfig: Make all Kconfig encoding ascii

Some of Kconfigs are using utf-8 encoding because of used chars. Convert
all of them to ascii enconging. Based on discussion ASCII should be used in
general with the exception of names.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-rockchip/px30/Kconfig b/arch/arm/mach-rockchip/px30/Kconfig
index 4189392..23f8f43 100644
--- a/arch/arm/mach-rockchip/px30/Kconfig
+++ b/arch/arm/mach-rockchip/px30/Kconfig
@@ -36,9 +36,9 @@
             10.1" OF for creating complete PX30.Core C.TOUCH 2.0 10.1" Open Frame.
 
 config TARGET_RINGNECK_PX30
-	bool "Theobroma Systems PX30-µQ7 (Ringneck)"
+	bool "Theobroma Systems PX30-uQ7 (Ringneck)"
 	help
-	  The PX30-uQ7 (Ringneck) SoM is a µQseven-compatible (40mmx70mm,
+	  The PX30-uQ7 (Ringneck) SoM is a uQseven-compatible (40mmx70mm,
           MXM-230 connector) system-on-module from Theobroma Systems[1],
 	  featuring the Rockchip PX30.
 
diff --git a/arch/arm/mach-rockchip/rk3588/Kconfig b/arch/arm/mach-rockchip/rk3588/Kconfig
index eb956b0..39049ab 100644
--- a/arch/arm/mach-rockchip/rk3588/Kconfig
+++ b/arch/arm/mach-rockchip/rk3588/Kconfig
@@ -66,7 +66,7 @@
 	                HDMI2.0, and HDMI1.4
 	  2x 4-lane MIPI-DSI, compatible with MIPI DPHY 2.0 or CPHY 1.1
 	  USB-A: USB 3.0, Type A
-	  USB-C: Full function USB Type‑C port, DP display up to 4Kp60, USB 3.0
+	  USB-C: Full function USB Type-C port, DP display up to 4Kp60, USB 3.0
 	  40-pin 2.54mm header connector: up to 2x SPIs, 6x UARTs, 1x I2Cs,
 	                                  8x PWMs, 2x I2Ss, 28x GPIOs
 	  Debug UART: 3 Pin 2.54mm header, 3V level, 1500000bps
@@ -117,7 +117,7 @@
 	  Mali G610MC4 GPU
 	  MIPI CSI 2 multiple lanes connector
 	  4-lane MIPI DSI connector
-	  Audio – 3.5mm earphone jack
+	  Audio - 3.5mm earphone jack
 	  eMMC module connector
 	  uSD slot (up to 128GB)
 	  2x USB 2.0, 2x USB 3.0
@@ -197,7 +197,7 @@
 	  4x ARM Cortex-A76, 4x ARM Cortex-A55
 	  8/16GB Memory LPDDR4x
 	  Mali G610MC4 GPU
-	  2× MIPI-CSI0 Connector
+	  2x MIPI-CSI0 Connector
 	  1x 2Lanes PCIe3.0 Connector
 	  1x SATA3.0 Connector
 	  32GB eMMC Module
diff --git a/arch/arm/mach-rockchip/rv1126/Kconfig b/arch/arm/mach-rockchip/rv1126/Kconfig
index ae323ee..330b7df 100644
--- a/arch/arm/mach-rockchip/rv1126/Kconfig
+++ b/arch/arm/mach-rockchip/rv1126/Kconfig
@@ -6,8 +6,8 @@
 	  Neu2:
 	  Neural Compute Module 2(Neu2) is a 96boards SoM-CB compute module
 	  based on Rockchip RV1126 from Edgeble AI.
-	  Neu2 powered with Consumer grade (0 to +80 °C) RV1126 SoC.
-	  Neu2k powered with Industrial grade (-40 °C to +85 °C) RV1126K SoC.
+	  Neu2 powered with Consumer grade (0 to +80 deg C) RV1126 SoC.
+	  Neu2k powered with Industrial grade (-40 C to +85 deg C) RV1126K SoC.
 
 	  Neu2-IO:
 	  Neural Compute Module 2(Neu2) IO board is an industrial form factor
diff --git a/drivers/mtd/spi/Kconfig b/drivers/mtd/spi/Kconfig
index d068b78..bedc4e9 100644
--- a/drivers/mtd/spi/Kconfig
+++ b/drivers/mtd/spi/Kconfig
@@ -246,7 +246,7 @@
 	  to erasing whole blocks (32/64 KiB).
 	  Changing a small part of the flash's contents is usually faster with
 	  small sectors. On the other hand erasing should be faster when using
-	  64 KiB block instead of 16 × 4 KiB sectors.
+	  64 KiB block instead of 16 x 4 KiB sectors.
 
 	  Please note that some tools/drivers/filesystems may not work with
 	  4096 B erase size (e.g. UBIFS requires 15 KiB as a minimum).