package/freescale-imx: update SITE to directly use https
http://www.nxp.com/ has a redirect to https://www.nxp.com/ for quite
some time now. It is also quite common to directly hit https:// urls
now.
Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit dc23c61e4d3fa9557db4977b8d30905a3f55e83d)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>