Revert "qseecom: Remove extra call to disable clock."

This reverts commit e163ea3d2834e5fa2da1b151a62feb98e1072dc6.
Revert "qseecom: Add SFAB clock voting in set_bandwidth request"

This reverts commit 59d930005ac1a3139b7d3f5b216c33236fdddfc0.