net: regex: Disable by default on sunXi

The sunXi arm64 build has overflown, leading to the main U-boot binary
overwriting the environment when flashing the new image, or even worse,
overwriting itself when we're calling saveenv.

Disable this option that is not critical until we can adress the issue
properly.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>

lib/Kconfig

@@ -57,6 +57,7 @@ config PANIC_HANG
 
 config REGEX
 	bool "Enable regular expression support"
+	default n if ARCH_SUNXI
 	default y if NET
 	help
 	  If this variable is defined, U-Boot is linked against the