ARM: mach-rockchip: tpl: Add hang() and udelay() for rk3036 tpl usage

If CONFIG_TPL_LIBGENERIC_SUPPORT is not defined, we need to implement
the hang() and udelay() for complier error.

Change-Id: I43d4d6c55ba893ef554641b3574297c81dd85c93
Signed-off-by: David Wu <david.wu@rock-chips.com>

arch/arm/mach-rockchip/tpl.c

@@ -32,6 +32,20 @@ void putc(char c)
 }
 #endif /* CONFIG_TPL_LIBCOMMON_SUPPORT */
 
+#ifndef CONFIG_TPL_LIBGENERIC_SUPPORT
+void udelay(unsigned long usec)
+{
+	__udelay(usec);
+}
+
+void hang(void)
+{
+        bootstage_error(BOOTSTAGE_ID_NEED_RESET);
+        for (;;)
+                ;
+}
+#endif
+
 u32 spl_boot_device(void)
 {
 	return BOOT_DEVICE_BOOTROM;