tegra: Define CONFIG_SKIP_LOWLEVEL_INIT for SPL build

Then we can get rid of the #ifdef CONFIG_TEGRA guard in cpu_init_crit.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/cpu/arm720t/start.S

@@ -247,7 +247,6 @@ c_runtime_cpu_setup:
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 cpu_init_crit:
 
-#if !defined(CONFIG_TEGRA)
 	mov	ip, lr
 	/*
 	 * before relocating, we have to setup RAM timing
@@ -256,7 +255,6 @@ cpu_init_crit:
 	 */
 	bl	lowlevel_init
 	mov	lr, ip
-#endif
 
 	mov	pc, lr
 #endif /* CONFIG_SKIP_LOWLEVEL_INIT */

include/configs/tegra-common-post.h

@@ -157,6 +157,8 @@
 /* overrides for SPL build here */
 #ifdef CONFIG_SPL_BUILD
 
+#define CONFIG_SKIP_LOWLEVEL_INIT
+
 /* remove devicetree support */
 #ifdef CONFIG_OF_CONTROL
 #undef CONFIG_OF_CONTROL