drm/msm/a690: Switch to a660_gmu.bin

There isn't actually a a690_gmu.bin. But it appears that the normal
a660_gmu.bin works fine. Normally all the devices within a sub-
generation (or "family") will use the same fw, and a690 is in the a660
family.

Signed-off-by: Rob Clark <[e-mail]>
Fixes: 5e7665b5e484 ("drm/msm/adreno: Add Adreno A690 support")
Reviewed-by: Konrad Dybcio <[e-mail]>
Patchwork: https://patchwork.freedesktop.org/patch/552406/

drivers/gpu/drm/msm/adreno/adreno_device.c

···
 		.family = ADRENO_6XX_GEN4,
 		.fw = {
 			[ADRENO_FW_SQE] = "a660_sqe.fw",
-			[ADRENO_FW_GMU] = "a690_gmu.bin",
+			[ADRENO_FW_GMU] = "a660_gmu.bin",
 		},
 		.gmem = SZ_4M,
 		.inactive_period = DRM_MSM_INACTIVE_PERIOD,