azalia: Make find_verb function non-static

To allow dropping copies of this function, make it non-static. Also,
rename it to `azalia_find_verb` as the function is now globally visible.
Finally, replace the copies in chipset code with `azalia_find_verb`.

Change-Id: Ie66323b2c62139e86d3d7e003f6653a3def7b5f2
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48348
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

src/include/device/azalia_device.h

@@ -19,6 +19,7 @@
 #define   HDA_ICII_VALID	(1 << 1)
 
 int azalia_set_bits(void *port, u32 mask, u32 val);
+u32 azalia_find_verb(struct device *dev, u32 viddid, const u32 **verb);
 void azalia_audio_init(struct device *dev);
 extern struct device_operations default_azalia_audio_ops;