Fix av7110 driver name (resend)

This patch simply changes the name of the av7110 driver to "av7110"
instead of the generic "dvb" it's set to currently. Although it's somewhat trivial, it still seems appropriate to fix the name to be descriptive of the driver.

This patch was already ack'ed by other users but the original email got mangled I guess so it was never submitted. The original email
is: "[PATCH] Fix av7110 driver name"

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diff -pruN v4l-dvb.orig/linux/drivers/media/dvb/ttpci/av7110.c v4l-dvb/linux/drivers/media/dvb/ttpci/av7110.c
@@ -2893,7 +2893,7 @@ MODULE_DEVICE_TABLE(pci, pci_tbl);
 
 
 static struct saa7146_extension av7110_extension_driver = {
-       .name           = "dvb",
+       .name           = "av7110",
        .flags          = SAA7146_USE_I2C_IRQ,
 
        .module         = THIS_MODULE,