arm: mvebu_v5_defconfig: remove stale MACH_LINKSTATION_LSCHL reference

The legacy board file for MACH_LINKSTATION_LSCHL was removed in
commit ecfe696 ("ARM: orion5x: remove legacy support of ls-chl")
after it was converted to DT booting, but a reference to it remained in
mvebu_v5_defconfig. Drop this unused code.

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Author: EthanNelson-Moore

arch/arm/configs/mvebu_v5_defconfig

@@ -15,7 +15,6 @@ CONFIG_MACH_DNS323=y
 CONFIG_MACH_TS209=y
 CONFIG_MACH_TERASTATION_PRO2=y
 CONFIG_MACH_LINKSTATION_PRO=y
-CONFIG_MACH_LINKSTATION_LSCHL=y
 CONFIG_MACH_LINKSTATION_MINI=y
 CONFIG_MACH_TS409=y
 CONFIG_MACH_TS78XX=y