staging: sbe-2t3e3: fix sparse warnings
staging: sbe-2t3e3: fix sparse warnings

warnings:
drivers/staging/sbe-2t3e3/netdev.c:24:5: warning: symbol 't3e3_ioctl' was not declared. Should it be static?
drivers/staging/sbe-2t3e3/netdev.c:85:5: warning: symbol 't3e3_open' was not declared. Should it be static?
drivers/staging/sbe-2t3e3/netdev.c:100:5: warning: symbol 't3e3_close' was not declared. Should it be static?

Signed-off-by: Devendra Naga <97fdf9fb34d40445b99f4e064a18057cd6e2bccb@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas