dt-bindings: i3c: drop "master" node name suffix

Drop the requirement of "-master" suffix in node names because:
1. "Master" word is discouraged and MIPI Alliance renamed it to
   "Controller".
2. Some devices can operate in Controller (Master) or Target mode, thus
   the name is not accurate in such cases.
3. Other buses, like I2C controllers, use simple "i2c".

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Jeremy Kerr <jk@codeconstruct.com.au>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240117075618.81932-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>