arm: stm32mp: Add Cut1.1 support for STM32MP21x

Add Cut1.1 support for STM32MP21x.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Change-Id: Icb78282f67023c01573a18b741aa81bd986a9400
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/u-boot/+/454603
ACI: CIBUILD <MDG-smet-aci-builds@list.st.com>
ACI: CITOOLS <MDG-smet-aci-reviews@list.st.com>

Author: Patrice Chotard

arch/arm/mach-stm32mp/stm32mp2/stm32mp21x.c

@@ -158,6 +158,9 @@ void get_soc_name(char name[SOC_NAME_SIZE])
 		case OTP_REVID_1:
 			cpu_r = "A";
 			break;
+		case OTP_REVID_1_1:
+			cpu_r = "Z";
+			break;
 		case OTP_REVID_2:
 			cpu_r = "B";
 			break;