Auto-declare chip_operations

The name is derived directly from the device path.

Change-Id: If2053d14f0e38a5ee0159b47a66d45ff3dff649a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/1471
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com>

src/superio/intel/i3100/chip.h

@@ -24,8 +24,6 @@
 #include <device/device.h>
 #include <uart8250.h>
 
-extern struct chip_operations superio_intel_i3100_ops;
-
 struct superio_intel_i3100_config {
 };