tegra2: Remove unneeded boot code

Since we have cache support built in we can remove Tegra's existing cache
initialization code amd other related dead code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/arch/arm/cpu/armv7/tegra2/ap20.h b/arch/arm/cpu/armv7/tegra2/ap20.h
index 1bb48d6..a4b4d73 100644
--- a/arch/arm/cpu/armv7/tegra2/ap20.h
+++ b/arch/arm/cpu/armv7/tegra2/ap20.h
@@ -95,13 +95,8 @@
 #define HALT_COP_EVENT_IRQ_1		(1 << 11)
 #define HALT_COP_EVENT_FIQ_1		(1 << 9)
 
-/* Prototypes */
-
+/* Start up the tegra2 SOC */
 void tegra2_start(void);
-void uart_init(void);
-void udelay(unsigned long);
-void cold_boot(void);
-void cache_configure(void);
 
 /* This is the main entry into U-Boot, used by the Cortex-A9 */
 extern void _start(void);