stm32mp1: fix indentation of U-Boot base name config

Fixes indentation of DHCOR Avenger96 and DHCOM PDK2 boards' U-Boot DTS
file base name configuration.

Fixes: e43efa5b691a ("stm32mp1: define STM32MP157A-DHCOR-AVENGER96")
Fixes: 5914639cb690 ("stm32mp1: define STM32MP157C-DHCOM-PDK2")
Reviewed-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>
diff --git a/stm32mp1.mk b/stm32mp1.mk
index 71db6a2..5056ccc 100644
--- a/stm32mp1.mk
+++ b/stm32mp1.mk
@@ -21,11 +21,11 @@
 else ifeq ($(PLATFORM),stm32mp1-157A_DHCOR_AVENGER96)
 BREXT_FLAVOR		= STM32MP157A-DHCOR-AVENGER96
 STM32MP1_DTS_BASENAME	= stm32mp157a-dhcor-avenger96
-STM32MP1_DTS_U_BOOT		= stm32mp15xx-dhcor-avenger96
+STM32MP1_DTS_U_BOOT	= stm32mp15xx-dhcor-avenger96
 else ifeq ($(PLATFORM),stm32mp1-157C_DHCOM_PDK2)
 BREXT_FLAVOR		= STM32MP157C-DHCOM-PDK2
 STM32MP1_DTS_BASENAME	= stm32mp157c-dhcom-pdk2
-STM32MP1_DTS_U_BOOT		= stm32mp15xx-dhcom-pdk2
+STM32MP1_DTS_U_BOOT	= stm32mp15xx-dhcom-pdk2
 else ifeq ($(PLATFORM),stm32mp1-157C_DK2)
 BREXT_FLAVOR		= STM32MP157C-DK2
 STM32MP1_DTS_BASENAME	= stm32mp157c-dk2