uboot-phytec

mailmap: Update mail address for Igor Opaniuk

My address at Linaro doesn't exist anymore, so people
keep getting mail delivery error responses. Map this address
to the actual one.

Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>