[ARM] 5163/1: pxa27x_udc: Allow choosing the bits in UP2OCR_SEOS

Allow choosing the bits in UP2OCR_SEOS.

Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>