arm64: lsdk.config: enable CONFIG_SFP and LYNX 28G SerDes PHY

Enable CONFIG_SFP for the Linux SFP infrastructure. Also, enable the
Lynx 28G SerDes PHY driver which supports runtime reconfiguration of
SerDes lanes.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>

arch/arm64/configs/lsdk.config

@@ -90,6 +90,8 @@ CONFIG_NETLINK_DIAG=y
 CONFIG_NETFILTER_XT_MATCH_COMMENT=y
 CONFIG_NET_SCHED=y
 CONFIG_NET_SCH_TBF=y
+CONFIG_SFP=y
+CONFIG_PHY_FSL_LYNX_28G=y
 
 # disable unneeded options and override default options set by defconfig to deduce the size of modules
 # CONFIG_USB_NET_DRIVERS is not set