davinci-mcasp: use bitfield definitions for PDIR
davinci-mcasp: use bitfield definitions for PDIR

The current driver creates value for set/clr of PDIR using (x<<26) instead
of the #defines that are convieniently made available.

Update the driver to use the bitfield definitions of PDIR. There is no
functional change introduced by this patch.

Signed-off-by: Ben Gardiner <70df8feb3ef5e98f393abcbbb2227739b5f9dc64@nanometrics.ca>
Reviewed-by: James Nuss <005aaaaeb32047f97ff7ff67dbc3e278976eef4e@nanometrics.ca>
Acked-by: Liam Girdwood <a57ef363056e61beffa2efa59c68550d40db03b0@ti.com>
Signed-off-by: Mark Brown <b51b9a92386687a9ac927cebfa0f978adeb8cea5@opensource.wolfsonmicro.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs