drivers/i2c/generic: Tweak error text for missing HID

- drop ERROR prefix since already provided by cbmem log
- make error text more clear about cause of error

BUG=none

Change-Id: I1795aee240a5383b21108c697e930a2e4972a0b4
Signed-off-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69062
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/i2c/generic/generic.c

@@ -62,7 +62,7 @@ void i2c_generic_fill_ssdt(const struct device *dev,
 		return;
 
 	if (!config->hid) {
-		printk(BIOS_ERR, "%s: ERROR: HID required\n", dev_path(dev));
+		printk(BIOS_ERR, "%s: HID required but not set\n", dev_path(dev));
 		return;
 	}