gpio: Kconfig: Update help for GPIO_PCA953X

Update help description with supported ICs from gpio-pca953x.c
Include missing IC names.

Signed-off-by: Akhilesh Patil <akhilesh@ee.iitb.ac.in>
Link: https://lore.kernel.org/r/aLmtOWjAWPtWe/gH@bhairav-test.ee.iitb.ac.in
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: Akhilesh Patil

drivers/gpio/Kconfig

@@ -1194,14 +1194,18 @@ config GPIO_PCA953X
 	  4 bits:       pca9536, pca9537
 
 	  8 bits:       max7310, max7315, pca6107, pca9534, pca9538, pca9554,
-	                pca9556, pca9557, pca9574, tca6408, tca9554, xra1202
+	                pca9556, pca9557, pca9574, tca6408, tca9554, xra1202,
+			pcal6408, pcal9554b, tca9538
 
 	  16 bits:      max7312, max7313, pca9535, pca9539, pca9555, pca9575,
-	                tca6416
+	                tca6416, pca6416, pcal6416, pcal9535, pcal9555a, max7318,
+			tca9539
 
-	  24 bits:      tca6424
+	  18 bits:	tca6418
 
-	  40 bits:      pca9505, pca9698
+	  24 bits:      tca6424, pcal6524
+
+	  40 bits:      pca9505, pca9698, pca9506
 
 config GPIO_PCA953X_IRQ
 	bool "Interrupt controller support for PCA953x"