Add support for TI TLC59208F (#718)

* Add support for TI TLC59208F

The chip is a 8-BIT FM+ I2C BUS LED DRIVER with
8 open-drain output channels.

Its features include:
- 256 linear levels
- group dimming
- group blinking
- 64 slave addresses
- customizable sub addresses and all call address
- output update on stop or on ACK
- 3.3V or 5V supply with 5V tolerant IO
- no glitch startup
- 50mA / output continuous current up to 17V

* Convert macro to uint8_t

Variables had to be renamed, clang-format would protest against
mixed case in global variable name.

* Change gen-call reset to use the correct i2c bus

tests/test1.yaml

@@ -745,6 +745,14 @@ pca9685:
   frequency: 500
   address: 0x0
 
+tlc59208f:
+  - address: 0x20
+    id: tlc59208f_1
+  - address: 0x22
+    id: tlc59208f_2
+  - address: 0x24
+    id: tlc59208f_3
+
 my9231:
   data_pin: GPIO12
   clock_pin: GPIO14
@@ -789,6 +797,42 @@ output:
   - platform: pca9685
     id: pca_7
     channel: 7
+  - platform: tlc59208f
+    id: tlc_0
+    channel: 0
+    tlc59208f_id: 'tlc59208f_1'
+  - platform: tlc59208f
+    id: tlc_1
+    channel: 1
+    tlc59208f_id: 'tlc59208f_1'
+  - platform: tlc59208f
+    id: tlc_2
+    channel: 2
+    tlc59208f_id: 'tlc59208f_1'
+  - platform: tlc59208f
+    id: tlc_3
+    channel: 0
+    tlc59208f_id: 'tlc59208f_2'
+  - platform: tlc59208f
+    id: tlc_4
+    channel: 1
+    tlc59208f_id: 'tlc59208f_2'
+  - platform: tlc59208f
+    id: tlc_5
+    channel: 2
+    tlc59208f_id: 'tlc59208f_2'
+  - platform: tlc59208f
+    id: tlc_6
+    channel: 0
+    tlc59208f_id: 'tlc59208f_3'
+  - platform: tlc59208f
+    id: tlc_7
+    channel: 1
+    tlc59208f_id: 'tlc59208f_3'
+  - platform: tlc59208f
+    id: tlc_8
+    channel: 2
+    tlc59208f_id: 'tlc59208f_3'
   - platform: gpio
     id: id2
     pin: