added all supported math funtion on 8 byte boundary with
immediate flag bit set automatically

added MATH_SRC0_DPOVRD & MATH_SRC1_DPOVRD

The function/defines above are needed for creating descriptors
longer than 64 words
Signed-off-by: NAndrei Varvara <andrei.varvara@freescale.com>
Reviewed-by: NPhillips Kim-R1AAHA <Kim.Phillips@freescale.com>
Reviewed-by: NFleming Andrew-AFLEMING <AFLEMING@freescale.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>