usb: gadget: Kconfig: use bool instead of boolean
usb: gadget: Kconfig: use bool instead of boolean

Keyword 'boolean' for type definition attributes is considered
deprecated and, therefore, should not be used anymore.

See http://lkml.kernel.org/r/cover.1418003065.git.82a36422d455213247e76b728a8ed41cf0074c73@linux.com
See http://lkml.kernel.org/r/1419108071-11607-1-git-send-email-82a36422d455213247e76b728a8ed41cf0074c73@linux.com

Signed-off-by: Christoph Jaeger <82a36422d455213247e76b728a8ed41cf0074c73@linux.com>
Signed-off-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs