usb: gadget: mass_storage: Use static array for luns

This patch replace dynamicly allocated luns array with static one.
This simplifies the code of mass storage function and modules.

Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>

diff --cc drivers/usb/gadget/function/f_mass_storage.c
Simple merge

diff --cc drivers/usb/gadget/function/f_mass_storage.h
Simple merge

diff --cc drivers/usb/gadget/legacy/acm_ms.c
Simple merge

diff --cc drivers/usb/gadget/legacy/mass_storage.c
Simple merge

diff --cc drivers/usb/gadget/legacy/multi.c
Simple merge

diff --cc drivers/usb/gadget/legacy/nokia.c
Simple merge