[target/msm7630]: Add code to auto detect interleaved mode.

Interleaved mode is identified using the build id provided
in shared memory. Configure the ptable entries for interleaved mode.
Configure GPIOs for the second NAND device. Add code to modify
the page size when operating in interleaved mode.

Change-Id: Ic1bbabc32b15ef0d17b52c89b1dcc639c0fef5ae
diff --git a/platform/init.c b/platform/init.c
index c6982da..488d744 100644
--- a/platform/init.c
+++ b/platform/init.c
@@ -48,3 +48,7 @@
 __WEAK void secondary_core(unsigned sec_entry)
 {
 }
+
+__WEAK void platform_config_interleaved_mode_gpios(void)
+{
+}