tty: serial: msm: Fix 'Missing a blank line after declarations' warning

This patch fixes below checkpatch.pl warning and it remove extra blank lines:

WARNING: Missing a blank line after declarations

Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>