firmware: cs_dsp: Allow creation of event controls

Some firmwares contain controls intended to convey firmware state back
to the host. Whilst more infrastructure will probably be needed for
these in time, as a first step allow creation of the controls, so said
firmwares arn't completely rejected.

Signed-off-by: Charles Keepax <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/firmware/cirrus/cs_dsp.c

···
 				return -EINVAL;
 			break;
 		case WMFW_CTL_TYPE_HOSTEVENT:
+		case WMFW_CTL_TYPE_FWEVENT:
 			ret = cs_dsp_check_coeff_flags(dsp, &coeff_blk,
 						       WMFW_CTL_FLAG_SYS |
 						       WMFW_CTL_FLAG_VOLATILE |

include/linux/firmware/cirrus/wmfw.h

···
 #define WMFW_CTL_TYPE_ACKED       0x1000 /* acked control */
 #define WMFW_CTL_TYPE_HOSTEVENT   0x1001 /* event control */
 #define WMFW_CTL_TYPE_HOST_BUFFER 0x1002 /* host buffer pointer */
+#define WMFW_CTL_TYPE_FWEVENT     0x1004 /* firmware event control */
 
 struct wmfw_header {
 	char magic[4];