ARM: netspace_v2: fix warnings

ARM: netspace_v2: fix warnings

Fix compiler warnings when compiling for netspace_v2, netspace_max_v2
and inetspace_v2:

netspace_v2.c: In function 'board_early_init_f':
netspace_v2.c:37: warning: implicit declaration of function 'kw_config_gpio'
netspace_v2.c: In function 'board_init':
netspace_v2.c:86: warning: implicit declaration of function 'kw_sdram_bar'

Signed-off-by: Anatolij Gustschin <[email protected]>
Cc: Simon Guinot <[email protected]>
Cc: Albert ARIBAUD <[email protected]>
Acked-by: Marek Vasut <[email protected]>