Adjust board_r.c for ppc

This adds ppc features to the generic post-relocation board init.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/common.h

@@ -312,6 +312,7 @@ int mac_read_from_eeprom(void);
 extern u8 _binary_dt_dtb_start[];	/* embedded device tree blob */
 int set_cpu_clk_info(void);
 int print_cpuinfo(void);
+int update_flash_size(int flash_size);
 
 /**
  * Show the DRAM size in a board-specific way