COIL: Rename i2c_peripheral files

BUG=none
TEST=build and run on volteer
BRANCH=none

Signed-off-by: dossym@chromium.org
Change-Id: I11a75e4954e918b2d4ff575dee14dec621a619b3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2587226
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>

chip/it83xx/build.mk

@@ -37,4 +37,4 @@ ifndef CONFIG_KEYBOARD_NOT_RAW
 chip-$(HAS_TASK_KEYSCAN)+=keyboard_raw.o
 endif
 chip-$(CONFIG_I2C_CONTROLLER)+=i2c.o
-chip-$(CONFIG_I2C_PERIPHERAL)+=i2c_slave.o
+chip-$(CONFIG_I2C_PERIPHERAL)+=i2c_peripheral.o

chip/it83xx/i2c_peripheral.c

@@ -10,7 +10,7 @@
 #include "console.h"
 #include "gpio.h"
 #include "hooks.h"
-#include "i2c_slave.h"
+#include "i2c_peripheral.h"
 #include "registers.h"
 #include <stddef.h>
 #include <string.h>