i2c: designware: Initialize adapter name only when not set

Check if the adapter name is already set in the driver prior to
initializing with generic name in i2c_dw_probe_master(). This
check allows to retain the unique adapter name driver has
initialized, which platform driver can use to distinguish it
from other i2c designware adapters.

Tested-by: Randy Dunlap <[e-mail]>
Signed-off-by: Pratap Nirujogi <[e-mail]>
Signed-off-by: Andi Shyti <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/i2c/busses/i2c-designware-master.c

···
 	if (ret)
 		return ret;
 
-	snprintf(adap->name, sizeof(adap->name),
-		 "Synopsys DesignWare I2C adapter");
+	if (!adap->name[0])
+		scnprintf(adap->name, sizeof(adap->name),
+			  "Synopsys DesignWare I2C adapter");
 	adap->retries = 3;
 	adap->algo = &i2c_dw_algo;
 	adap->quirks = &i2c_dw_quirks;