drivers/i2c/rx6110sa/chip.h: Remove confusing bus speed comment

There is a note about the default I2C speed of this being 400 kHz
despite the logic in rx6110sa.c sets the fallback (correctly) to
100 kHz.

This information originally comes from the fact the dw_i2c bus
controller default speed is 400 kHz. This is irrelevant to
the default speed of this device as it can be used with any
bus controller.

BUG=none
TEST=coreboot builds correctly (no functional changes).

Change-Id: Ic0ffe5667574c59e1c1df952b84b8a3680b53341
Signed-off-by: Jan Samek <jan.samek@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69545
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/drivers/i2c/rx6110sa/chip.h b/src/drivers/i2c/rx6110sa/chip.h
index 4df9580..1c0abe8 100644
--- a/src/drivers/i2c/rx6110sa/chip.h
+++ b/src/drivers/i2c/rx6110sa/chip.h
@@ -3,7 +3,7 @@
 #include "rx6110sa.h"
 
 struct drivers_i2c_rx6110sa_config {
-	unsigned int bus_speed;		/* Bus clock in Hz (default 400 kHz)*/
+	unsigned int bus_speed;		/* Bus clock in Hz */
 	/* The day (of the week) is indicated by 7 bits, bit 0 to bit 6. */
 	unsigned char user_weekday;	/* User day of the week to set */
 	unsigned char user_day;		/* User day to set */