ARM: DockStar: fix compilation

ARM: DockStar: fix compilation

Fix build problem:

mvgbe.c: In function 'mvgbe_initialize':
mvgbe.c:735: warning: implicit declaration of function 'get_random_hex'
dockstar.c: In function 'board_early_init_f':
dockstar.c:43: warning: implicit declaration of function 'kw_config_gpio'
dockstar.c: In function 'board_init':
dockstar.c:113: warning: implicit declaration of function 'kw_sdram_bar'
dockstar.c: In function 'set_leds':
dockstar.c:161: warning: implicit declaration of function 'readl'
dockstar.c:161: error: dereferencing pointer to incomplete type
dockstar.c:162: warning: implicit declaration of function 'writel'
dockstar.c:162: error: dereferencing pointer to incomplete type
dockstar.c:163: error: dereferencing pointer to incomplete type
dockstar.c:164: error: dereferencing pointer to incomplete type
make[1]: *** [dockstar.o] Error 1
make: *** [board/Seagate/dockstar/libdockstar.o] Error 2

Reported-by: Roland Kletzing <devzero@web.de>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Prafulla Wadaskar <prafulla@marvell.com>