USB: musb: correct spelling mistakes in comment and error string

Signed-off-by: Rahul Bedarkar <rahulbedarkar89@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/usb/musb/blackfin.c
Simple merge

diff --cc drivers/usb/musb/musb_core.c
Simple merge

diff --cc drivers/usb/musb/musb_cppi41.c
Simple merge

diff --cc drivers/usb/musb/musb_host.c
Simple merge