util/smmstoretool: add uint64 data type

It's in particular useful for working with variables that contain 64-bit
pointers, like CapsuleUpdateData* global variables defined by UEFI
specification.

Change-Id: I4b46b41cdc5f69d4ca189659bef1e44f64c0d554
Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82611
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Krystian Hebel <krystian.hebel@3mdeb.com>

util/smmstoretool/data.h

@@ -12,6 +12,7 @@ enum data_type {
 	DATA_TYPE_UINT8,
 	DATA_TYPE_UINT16,
 	DATA_TYPE_UINT32,
+	DATA_TYPE_UINT64,
 	DATA_TYPE_ASCII,
 	DATA_TYPE_UNICODE,
 	DATA_TYPE_RAW,