rk27xx: initialize i2c driver in bootloader.

Change-Id: I0b343425d0cfef4d4609cabca79c1f31d8327d3b
Reviewed-on: http://gerrit.rockbox.org/459
Reviewed-by: Andrew Ryabinin <ryabinin.a.a@gmail.com>

bootloader/rk27xx.c

@@ -19,6 +19,7 @@
 #include "crc32-rkw.h"
 #include "rkw-loader.h"
 #include "version.h"
+#inlcude "i2c-rk27xx.h"
 
 /* beginning of DRAM */
 #define DRAM_ORIG 0x60000000
@@ -112,6 +113,7 @@ void main(void)
     power_init();
     system_init();
     kernel_init();
+    i2c_init();
     enable_irq();
 
     adc_init();