chromeos: vboot and chromeos dependency removal for sw write protect state

This removes the dependency on chromeos and vboot for the sw write protect state
function: vboot_get_sw_write_protect, renamed to get_sw_write_protect_state to
both reflect this change and become consistent with the definition of
get_write_protect_state that is already in use.

Change-Id: I47ce31530a03f6749e0f370e5d868466318b3bb6
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-on: http://review.coreboot.org/11496
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/soc/intel/baytrail/romstage/romstage.c b/src/soc/intel/baytrail/romstage/romstage.c
index 1b93eb6..7bd2663 100644
--- a/src/soc/intel/baytrail/romstage/romstage.c
+++ b/src/soc/intel/baytrail/romstage/romstage.c
@@ -362,11 +362,9 @@
 #endif
 }
 
-#if CONFIG_CHROMEOS
-int vboot_get_sw_write_protect(void)
+int get_sw_write_protect_state(void)
 {
 	u8 status;
 	/* Return unprotected status if status read fails. */
 	return (early_spi_read_wpsr(&status) ? 0 : !!(status & 0x80));
 }
-#endif