soc/intel/common/block: Drop unused `intelblocks/mp_init.h` include

Change-Id: I8621a38214686b359ee0e7cdf7e92154af3cbc81
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56381
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/common/block/sgx/sgx.c

@@ -6,7 +6,6 @@
 #include <cpu/intel/microcode.h>
 #include <cpu/intel/common/common.h>
 #include <intelblocks/cpulib.h>
-#include <intelblocks/mp_init.h>
 #include <intelblocks/msr.h>
 #include <intelblocks/sgx.h>
 #include <intelblocks/systemagent.h>