dt-bindings: trivial: Add RTCs

Add remaining trivial RTC bindings.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/trivial-devices.txt

@@ -41,6 +41,7 @@ dallas,ds1338		I2C RTC with 56-Byte NV RAM
 dallas,ds1340		I2C RTC with Trickle Charger
 dallas,ds1374		I2C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output
 dallas,ds1631		High-Precision Digital Thermometer
+dallas,ds1672		Dallas DS1672 Real-time Clock
 dallas,ds1682		Total-Elapsed-Time Recorder with Alarm
 dallas,ds1775		Tiny Digital Thermometer and Thermostat
 dallas,ds3232		Extremely Accurate I²C RTC with Integrated Crystal and SRAM
@@ -56,6 +57,7 @@ domintech,dmard10	DMARD10: 3-axis Accelerometer
 epson,rx8010		I2C-BUS INTERFACE REAL TIME CLOCK MODULE
 epson,rx8025		High-Stability. I2C-Bus INTERFACE REAL TIME CLOCK MODULE
 epson,rx8581		I2C-BUS INTERFACE REAL TIME CLOCK MODULE
+emmicro,em3027		EM Microelectronic EM3027 Real-time Clock
 fsl,mag3110		MAG3110: Xtrinsic High Accuracy, 3D Magnetometer
 fsl,mc13892		MC13892: Power Management Integrated Circuit (PMIC) for i.MX35/51
 fsl,mma7660		MMA7660FC: 3-Axis Orientation/Motion Detection Sensor
@@ -67,6 +69,8 @@ gmt,g751		G751: Digital Temperature Sensor and Thermal Watchdog with Two-Wire In
 infineon,slb9635tt	Infineon SLB9635 (Soft-) I2C TPM (old protocol, max 100khz)
 infineon,slb9645tt	Infineon SLB9645 I2C TPM (new protocol, max 400khz)
 isil,isl1208		Intersil ISL1208 Low Power RTC with Battery Backed SRAM
+isil,isl1218		Intersil ISL1218 Low Power RTC with Battery Backed SRAM
+isil,isl12022		Intersil ISL12022 Real-time Clock
 isil,isl29028		Intersil ISL29028 Ambient Light and Proximity Sensor
 isil,isl29030		Intersil ISL29030 Ambient Light and Proximity Sensor
 maxim,ds1050		5 Bit Programmable, Pulse-Width Modulator
@@ -155,6 +159,7 @@ nxp,pca9556		Octal SMBus and I2C registered interface
 nxp,pca9557		8-bit I2C-bus and SMBus I/O port with reset
 nxp,pcf2127		Real-time clock
 nxp,pcf2129		Real-time clock
+nxp,pcf8523		Real-time Clock
 nxp,pcf8563		Real-time clock/calendar
 nxp,pcf85063		Tiny Real-Time Clock
 oki,ml86v7667		OKI ML86V7667 video decoder