usb: musb: da8xx: Fix build breakage due to typo

usb: musb: da8xx: Fix build breakage due to typo

commit db9e51617faad3a54d10b7cb340a82688ec0232d upstream.

Commit 032ec49f5351e9cb242b1a1c367d14415043ab95 (usb: musb: drop useless
board_mode usage) introduced a typo that breaks the build.

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
[ Fixed commit message ]

Signed-off-by: Michael Riesch <michael.riesch@omicron.at>
Cc: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
Cc: Sergei Shtylyov <sshtylyov@mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>