arch/x86: Drop _car_relocatable_data symbols

These have become aliases to _car_global_[start|end].

Change-Id: Ibdcaaafdc0e4c6df4a795474903768230d41680d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35033
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/soc/intel/quark/romstage/fsp2_0.c

@@ -115,7 +115,7 @@ void platform_fsp_memory_init_params_cb(FSPM_UPD *fspm_upd, uint32_t version)
 			aupd->StackBase);
 		printk(BIOS_SPEW, "|                   |\n");
 		printk(BIOS_SPEW, "+-------------------+ 0x%p\n",
-			_car_relocatable_data_end);
+			_car_global_end);
 		printk(BIOS_SPEW, "| coreboot data     |\n");
 		printk(BIOS_SPEW, "+-------------------+ 0x%p\n",
 			_car_stack_end);