Makefile: Fix initial make kconfig issue

When running `make` for the first time we must skip over the 'all:'
target to invocate kconfig correctly.

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Make is silent per default, but 'make V=1' will show all compiler calls

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Makefile.rules: Invocate 'menuconfig' over 'config' as kconfig default

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>