Style fixes for the Netlogic XLP RSA driver

Updates to the Netlogic XLP on-chp RSA block driver. The changes are
to follow style(9) guidelines, to improve readability and to remove
unnecessary initialization.

No changes to logic have been introduced by this commit.

Submitted by:	Venkatesh J. V. <venkatesh.vivekanandan@broadcom.com>
Approved by:	re (hrs)