dt-bindings: add amc6821, isl1208 trivial bindings

TI AMC6821 fan controller and Intersil ISL1208 are trivial
devices, so add them to the binding list.
Signed-off-by: Klaus Goger <klaus.goger@theobroma-systems.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/trivial-devices.txt

@@ -66,6 +66,7 @@ fsl,sgtl5000		SGTL5000: Ultra Low-Power Audio Codec
 gmt,g751		G751: Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface
 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,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
@@ -180,6 +181,7 @@ st,m41t80		M41T80 - SERIAL ACCESS RTC WITH ALARMS
 taos,tsl2550		Ambient Light Sensor with SMBUS/Two Wire Serial Interface
 ti,ads7828		8-Channels, 12-bit ADC
 ti,ads7830		8-Channels, 8-bit ADC
+ti,amc6821		Temperature Monitoring and Fan Control
 ti,tsc2003		I2C Touch-Screen Controller
 ti,tmp102		Low Power Digital Temperature Sensor with SMBUS/Two Wire Serial Interface
 ti,tmp103		Low Power Digital Temperature Sensor with SMBUS/Two Wire Serial Interface