mt7915e driver supports MT7915 & MT7916 devices and MT7981 & MT7986
on-SoC wireless controllers. Devices based on MT7988 and possibly other
next chipsets are quite unlikely to need it (MT7988 was designed to be
used with MT7996).
Move kmod-mt7915e to DEVICE_PACKAGES of relevant devices.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>