vexpress64: Kconfig: tidy up

The FVP and Juno settings were identical, but duplicated, so I removed
the duplication with this patch.
Signed-off-by: NRyan Harkin <ryan.harkin@linaro.org>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
[trini: Adjust logic to keep if/endif in the file]
Signed-off-by: NTom Rini <trini@konsulko.com>

board/armltd/vexpress64/Kconfig

-if TARGET_VEXPRESS64_BASE_FVP
-
-config SYS_BOARD
-	default "vexpress64"
-
-config SYS_VENDOR
-	default "armltd"
-
-config SYS_CONFIG_NAME
-	default "vexpress_aemv8a"
-
-endif
-
-if TARGET_VEXPRESS64_JUNO
+if TARGET_VEXPRESS64_BASE_FVP || TARGET_VEXPRESS64_JUNO
 
 config SYS_BOARD
 	default "vexpress64"