MAINTAINERS: Add Granite Rapids FSP to Xeon-SP

Change-Id: I5170a69d798d0e8198b89f6932a80e6051228ac2
Signed-off-by: Shuo Liu <shuo.liu@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82082
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 2963ab4..c23e3d0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -951,6 +951,7 @@
 F:	src/vendorcode/intel/fsp/fsp2_0/skylake_sp/
 F:	src/vendorcode/intel/fsp/fsp2_0/copperlake_sp/
 F:	src/vendorcode/intel/fsp/fsp2_0/sapphirerapids_sp/
+F:	src/vendorcode/intel/fsp/fsp2_0/graniterapids/
 
 MEDIATEK SOCS
 M:	Hung-Te Lin <hungte@chromium.org>