generic: 5.15: add missing symbols

These were found during work on new device support under the
imx/cortexa7 target.

Signed-off-by: Piotr Dymacz <[email protected]>

target/linux/generic/config-5.15

@@ -5954,7 +5954,9 @@ CONFIG_SND_PROC_FS=y
 # CONFIG_SND_SOC_IMG is not set
 # CONFIG_SND_SOC_IMX_AUDMIX is not set
 # CONFIG_SND_SOC_IMX_AUDMUX is not set
+# CONFIG_SND_SOC_IMX_CARD is not set
 # CONFIG_SND_SOC_IMX_ES8328 is not set
+# CONFIG_SND_SOC_IMX_HDMI is not set
 # CONFIG_SND_SOC_IMX_SPDIF is not set
 # CONFIG_SND_SOC_IMX_WM8962 is not set
 # CONFIG_SND_SOC_INNO_RK3036 is not set