soc/intel/skl: Drop weak mainboard_memory_init_params

We should not need that.

Change-Id: Ic0181a300670ed7ee999dafedac79f3f89bfbee9
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41114
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Michael Niewöhner

src/soc/intel/skylake/romstage/romstage.c

@@ -323,8 +323,3 @@ void soc_update_memory_params_for_mma(FSP_M_CONFIG *memory_cfg,
 	memory_cfg->MrcFastBoot = 0x00;
 	memory_cfg->SaGv = 0x02;
 }
-
-__weak void mainboard_memory_init_params(FSPM_UPD *mupd)
-{
-	/* Do nothing */
-}