fs/9p: iattr_valid flags are kernel internal flags map them to 9p values.
fs/9p: iattr_valid flags are kernel internal flags map them to 9p values.

Kernel internal values can change, add protocol values for these constant
and use them.

Signed-off-by: Aneesh Kumar K.V <f511f818e8a0748edef6b9ee378967da9ed0c78f@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <f6aaec02cb2023b586fda1596c965a5752b892b4@gmail.com>

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