Prepare v2021.10-stm32mp-r2.1

Update version in Makefile to prepare the label v2021.10-stm32mp-r2.1
for OpenSTLinux V4.1.1

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Change-Id: Ie84b0e83a92bedf10ff6c02361b86afe6f977178
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/u-boot/+/314900
ACI: CITOOLS <MDG-smet-aci-reviews@list.st.com>
ACI: CIBUILD <MDG-smet-aci-builds@list.st.com>

Author: Patrice Chotard

Makefile

@@ -3,7 +3,7 @@
 VERSION = 2021
 PATCHLEVEL = 10
 SUBLEVEL =
-EXTRAVERSION = -stm32mp-r2
+EXTRAVERSION = -stm32mp-r2.1
 NAME =
 
 # *DOCUMENTATION*