maintainers: update NXP email
maintainers: update NXP email

Updated email of maintainer.

Signed-off-by: Sachin Saxena <22665d18b083d287876f507c3d0f65800f1404e7@oss.nxp.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk