powerpc: mpc85xx: Fix incorrect application of patch

I messed up application of patch 5a428e751044 ("mmc: fsl_esdhc_spl: Add
support for builds without CONFIG_SYS_MMC_U_BOOT_OFFS"). I took it from
a work-in-progress branch where I changed usage of
  CONFIG_SDCARD to CONFIG_SD_BOOT
and refactored
  SYS_MPC85XX_NO_RESETVEC
mess.

But these changes aren't in master yet. Fix the wrong usage of these
macros.

Fixes: 5a428e751044 ("mmc: fsl_esdhc_spl: Add support for builds without
CONFIG_SYS_MMC_U_BOOT_OFFS")
Signed-off-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Pali Rohár <pali@kernel.org>
diff --git a/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds b/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds
index a36aa17..f28826c 100644
--- a/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds
+++ b/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds
@@ -63,8 +63,8 @@
 	__init_end = .;
 	_end = .;
 
-#ifndef KEEP_RESET_VECTOR
-#if defined(CONFIG_SD_BOOT) && !defined(CONFIG_SYS_MMC_U_BOOT_OFFS)
+#if CONFIG_IS_ENABLED(SYS_MPC85XX_NO_RESETVEC)
+#if defined(CONFIG_SDCARD) && !defined(CONFIG_SYS_MMC_U_BOOT_OFFS)
 	mmc_u_boot_offs = .;
 #endif
 #endif
@@ -101,7 +101,7 @@
 	.resetvec IMAGE_TEXT_BASE + RESET_VECTOR_OFFSET : {
 		KEEP(*(.resetvec))
 	} = 0xffff
-#if defined(CONFIG_SD_BOOT) && !defined(CONFIG_SYS_MMC_U_BOOT_OFFS)
+#if defined(CONFIG_SDCARD) && !defined(CONFIG_SYS_MMC_U_BOOT_OFFS)
 	mmc_u_boot_offs = .;
 #endif
 #endif