usb: storage: ene_ub6250: fix sparse warnings

Fix the following sparse warnings:

| drivers/usb/storage/ene_ub6250.c:45:22: warning: symbol
|	'ene_ub6250_usb_ids' was not declared. Should it
|	be static?
|
| drivers/usb/storage/ene_ub6250.c:780:5: warning: symbol
|	'ms_lib_alloc_logicalmap' was not declared. Should it
|	be static?
|
| drivers/usb/storage/ene_ub6250.c:2251:5: warning: symbol
|	'ms_scsi_irp' was not declared. Should it be static?
|
| drivers/usb/storage/ene_ub6250.c:638:29: warning: right shift by bigger
|	than source value
|
| drivers/usb/storage/ene_ub6250.c:639:29: warning: right shift by bigger
|	than source value

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>