boot/at91bootstrap3: move BR2_TARGET_AT91BOOTSTRAP3_NEEDS_PYTHON3

As spotted by Eugen, BR2_TARGET_AT91BOOTSTRAP3_NEEDS_PYTHON3 currently
is outside the at91bootstrap section, because it was inccorectly added
after the 'endif' statement rather than before, which makes the
menuconfig layout weird.

Move it around.

Reported-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

boot/at91bootstrap3/Config.in

@@ -100,8 +100,6 @@ config BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_CONFIG_FILE
 	help
 	  Path to the at91bootstrap3 configuration file
 
-endif # BR2_TARGET_AT91BOOTSTRAP3
-
 config BR2_TARGET_AT91BOOTSTRAP3_NEEDS_PYTHON3
 	bool "needs host-python3"
 	help
@@ -109,3 +107,5 @@ config BR2_TARGET_AT91BOOTSTRAP3_NEEDS_PYTHON3
 	  Python 3.x to be available on the host. This is needed in
 	  some at91bootstrap configurations to use NAND/PMECC Python
 	  scripts.
+
+endif # BR2_TARGET_AT91BOOTSTRAP3