Ext2: remove the overhead check about sb in the function ext2_new_blocks
Ext2: remove the overhead check about sb in the function ext2_new_blocks

It can be guranteed that inode->i_sb should not be null in vfs.
So here the check about it is overhead.

Signed-off-by: Wang Shilong <2619f00d4b1c70e3aae124ec60dac0e454c5a3a3@cn.fujitsu.com>
Signed-off-by: Jan Kara <596727c8a0ea4db3ba2ceceedccbacd3d7b371b8@suse.cz>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas