i9300 defconfig: little bit higher mem reservation

Change-Id: Ifef55b9de8f874122bd4b8a5be3696806d69566e
exfat

Change-Id: I95fb96fa0e5cdd0c5cdc5f6167e2edd128ed6015
clean root dir after init

Change-Id: Ie3a3ccab1ec712c77b2b7298e310fe669ce63cc5