soc/intel/common: Increase SMM_MODULE_STACK_SIZE to 0x800

While running the s0ix cycling test, we observed SMM Handler caused
a stack overflow. This error happens during event log access.

This change is to increase the SMM_MODULE_STACK size to 0x800

BUG=b:135551854
TEST=suspend_resume test pass 500+ cycles, originally issue happenes
     within 150 cycle

Change-Id: Ib4686b4d2d4fc3976068779314f4ee15ef4a8ae2
Signed-off-by: Kane Chen <kane.chen@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33999
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/soc/intel/common/Kconfig

@@ -68,4 +68,8 @@ config SOC_INTEL_DEBUG_CONSENT
 	  Set this option to enable default debug interface of SoC such as DBC
 	  or DCI.
 
+config SMM_MODULE_STACK_SIZE
+	hex
+	default 0x800
+
 endif # SOC_INTEL_COMMON