arm: Rename STM32MP13x

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: Igor Opaniuk <igor.opaniuk@foundries.io>
diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index 5fc92d0..241fcf3 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -37,7 +37,7 @@
 	prompt "Select STMicroelectronics STM32MPxxx Soc"
 	default STM32MP15x
 
-config STM32MP13x
+config STM32MP13X
 	bool "Support STMicroelectronics STM32MP13x Soc"
 	select ARM_SMCCC
 	select CPU_V7A
@@ -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