plat-stm32mp1: conf: fix tzdram default size when w/o rsv-shm

Fix the default TZDRAM size that is 32MByte when CFG_CORE_RESERVED_SHM
is disable, not 30MByte.

Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>

core/arch/arm/plat-stm32mp1/conf.mk

@@ -141,7 +141,11 @@ CFG_STM32MP1_SCMI_SHM_BASE ?= 0x2ffff000
 CFG_STM32MP1_SCMI_SHM_SIZE ?= 0x00001000
 ifeq ($(CFG_STM32MP15),y)
 CFG_TZDRAM_START ?= 0xfe000000
+ifeq ($(CFG_CORE_RESERVED_SHM),y)
 CFG_TZDRAM_SIZE  ?= 0x01e00000
+else
+CFG_TZDRAM_SIZE  ?= 0x02000000
+endif
 CFG_TZSRAM_START ?= 0x2ffc0000
 CFG_TZSRAM_SIZE  ?= 0x0003f000
 ifeq ($(CFG_CORE_RESERVED_SHM),y)