Rename __intel_wait_for_register_nowl() to
__intel_de_wait_for_register_nowl() to be in line with the rest of
intel_de.h.

Cc: Luca Coelho <luciano.coelho@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/967d3fc67a9053f7d5f9c03010fd5f94dc8d547d.1713358679.git.jani.nikula@intel.com