arm: Rename STM32MP15x

CONFIG options must not use lower-case letter. Convert this and related
ones to upper case.

Signed-off-by: Simon Glass <sjg@chromium.org
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index 241fcf3..a1763ff 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -35,7 +35,7 @@
 
 choice
 	prompt "Select STMicroelectronics STM32MPxxx Soc"
-	default STM32MP15x
+	default STM32MP15X
 
 config STM32MP13X
 	bool "Support STMicroelectronics STM32MP13x Soc"
@@ -55,7 +55,7 @@
 		support of STMicroelectronics SOC STM32MP13x family
 		STMicroelectronics MPU with core ARMv7
 
-config STM32MP15x
+config STM32MP15X
 	bool "Support STMicroelectronics STM32MP15x Soc"
 	select ARCH_SUPPORT_PSCI
 	select BINMAN
@@ -127,7 +127,7 @@
 
 config STM32_ETZPC
 	bool "STM32 Extended TrustZone Protection"
-	depends on STM32MP15x || STM32MP13X
+	depends on STM32MP15X || STM32MP13X
 	default y
 	imply BOOTP_SERVERIP
 	help