soc/amd/mendocino: Consume fsp misc_data hob

Provide support function to query fsp misc_data hob and return smu
reported power and thermal limit.

BUG=b:253301653
TEST=Use get_amd_smu_reported_tdp(&tdp) values match what FSP placed in
the hob.

Change-Id: I9f0d8cdd616726c5a714e99504b83b0126dd273b
Signed-off-by: Jason Glenesk <jason.glenesk@amd.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73747
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/vendorcode/amd/fsp/mendocino/FspGuids.h

@@ -21,4 +21,8 @@
 		GUID_INIT(0x3060C5EC, 0x7399, 0x432D, \
 		0xBC, 0x97, 0xBF, 0x95, 0xE4, 0x3D, 0x53, 0x0C )
 
+#define AMD_MISC_DATA_HOB_GUID \
+		GUID_INIT(0x27f7d972, 0x318f, 0x4665, \
+		0x8a, 0x99, 0xf4, 0x4c, 0x04, 0x4b, 0x49, 0x08)
+
 #endif /* __FSP_GUIDS__ */