flashchips.c: Add write protect support for W25Q16.V

Enable WRSR2 feature flag and define reg_bits and decode_range for
W25Q16.V to enable write protect support.

Based on W25Q16DV, Revision: 1, Release: Nov 18 2014 datasheet

TEST=flashrom --wp-{enable,disable,range,list,status}

Change-Id: I6c0b35f82b47a1169bccfd08222e9e3b3be30d75
Signed-off-by: Khoa Hoang <admin@khoahoang.com>
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M flashchips.c
1 file changed, 29 insertions(+), 2 deletions(-)