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/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