Staging: wlags49_h2: use common PCI_VENDOR/DEVICE_ID name format

There is a common name format for PCI_VENDOR/DEVICE_ID constants.
wlags49_h2 names doesn't fit in the standard.
This patch change the names and also fix some style issues.

Thanks a lot,

Signed-off-by: Javier Martinez Canillas <martinez.javier@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>