update GCC version check after Kbuild bump

ARM GCC tool check is not up to date,
while issues are reported such as file truncated linker errors.
Using ARM official cross tools shows that 10.0.1 is a safe
version to support latest kbuild bump properly.

Signed-off-by: Brian Sune <briansune@gmail.com>

arch/arm/config.mk

@@ -58,7 +58,7 @@ endif
 
 # Only test once
 ifeq ($(CONFIG_$(PHASE_)SYS_THUMB_BUILD),y)
-archprepare: checkthumb checkgcc6
+archprepare: checkthumb checkgcc10
 
 checkthumb:
 	@if test "$(call cc-name)" = "gcc" -a \
@@ -69,13 +69,13 @@ checkthumb:
 		false; \
 	fi
 else
-archprepare: checkgcc6
+archprepare: checkgcc10
 endif
 
-checkgcc6:
+checkgcc10:
 	@if test "$(call cc-name)" = "gcc" -a \
-			"$(call cc-version)" -lt "0600"; then \
-		echo '*** Your GCC is older than 6.0 and is not supported'; \
+			"$(call cc-version)" -lt "1000"; then \
+		echo '*** Your GCC is older than 10.0 and is not supported'; \
 		false; \
 	fi