qoriq: enable support for Marvell Alaska PHYs

The WatchGuard Firebox M200 and M300 use a Marvell 88e1543 PHY for the
first 3 ethernet ports. This PHY is supported by the Marvell Alaska PHY
driver, so enable it.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

target/linux/qoriq/config-5.10

@@ -207,6 +207,7 @@ CONFIG_LIBFDT=y
 CONFIG_LOCK_DEBUGGING_SUPPORT=y
 CONFIG_LOCK_SPIN_ON_OWNER=y
 CONFIG_MAGIC_SYSRQ=y
+CONFIG_MARVELL_PHY=y
 CONFIG_MATH_EMULATION=y
 # CONFIG_MATH_EMULATION_FULL is not set
 CONFIG_MATH_EMULATION_HW_UNIMPLEMENTED=y