Revert "soc/apollolake: Add soc core init"

This reverts commit a52f883b10
(https://review.coreboot.org/16587).

The above commit caused another sever kernel boot regression upwards
of 2 minutes to get through kernel init on quad core systems.

BUG=chrome-os-partner:58994

Change-Id: Id4abc332bf2266e3b3b7be714371ce9cf329bcd9
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/17121
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Andrey Petrov <andrey.petrov@intel.com>

src/soc/intel/apollolake/chip.c

@@ -461,7 +461,6 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *silupd)
 		silconfig->EmmcRxCmdDataCntl2 = cfg->emmc_rx_cmd_data_cntl2;
 
 	silconfig->LPSS_S0ixEnable = cfg->lpss_s0ix_enable;
-	silconfig->SkipMpInit = 1;
 
 	/* Disable monitor mwait since it is broken due to a hardware bug without a fix */
 	silconfig->MonitorMwaitEnable = 0;