plat-stm32mp1: default disable CFG_STM32MP1_SCMI_SHM_SYSRAM

Default disable CFG_STM32MP1_SCMI_SHM_SYSRAM to sync with mainline
Linux kernel that uses OP-TEE shared memory for SCMI communication
on STM32MP13 platform instead a piece of SRAM [1].

Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f0f0682c384d81bf25e6f8b23971fb8f69122f72
Acked-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>

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

@@ -118,7 +118,6 @@ $(call force,CFG_TEE_CORE_NB_CORE,1)
 $(call force,CFG_WITH_NSEC_GPIOS,n)
 CFG_EXTERNAL_DT ?= n
 CFG_STM32MP_OPP_COUNT ?= 2
-CFG_STM32MP1_SCMI_SHM_SYSRAM ?= y
 CFG_WITH_PAGER ?= n
 endif # CFG_STM32MP13