[email protected] email-id doesn't exist anymore as he has left the
company.  Replace ST's id with [email protected].

It also updates .mailmap file to fix address for 'git shortlog'.

Signed-off-by: Viresh Kumar <[email protected]>
Cc: Shiraz Hashim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>