drivers: dai: sai: Add fix for i.MX93 SAI errata 051421

ERRATA 051421 states that if the SAI is FSYNC/BCLK master,
one of the directions is SYNC with the other, and the
ASYNC direction has the BYP bit toggled, the SYNC direction's
BCLK won't be generated properly.

This commit fixes this issue by enabling BCI for the SYNC
direction. What this does is it makes the SYNC direction use
the BCLK from the ASYNC direction's pad, which, if the BYP
bit is toggled, will be the undivided MCLK. Without this fix,
the SYNC direction will use the ASYNC direction's BCLK obtained
by dividing the MCLK via the following formula: MCLK / ((DIV + 1) * 2).
This is wrong because the ASYNC direction will use an undivided
MCLK while the SYNC direction will use a divided MCLK.

Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>