fs: Tweak mount options for all partitions

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
binfmt_elf.c: use get_random_int() to fix entropy depleting

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
fat: limit the number of error prints

Use fat_fs_error_ratelimit instead of fat_fs_error so as to
avoid large number of prints.

Change-Id: I2e21e6bd0c8e7e79d3ced9c213668c405fd6260d
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Manish Kumar <manishku@codeaurora.org>