meta-ampere: mtmitchell: use standard gpio commands

Change to use gpioset and gpioget to set value for output GPIOs and read
value for input GPIOs.
This commit also corrects GPIO base numbers which are changed in Linux
kernel 6.5

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: I802f9d777537ff28f94945006b6582b15523e3a8
diff --git a/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init/gpio-lib.sh b/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init/gpio-lib.sh
index 5fbbbcc..c9eb2b9 100644
--- a/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init/gpio-lib.sh
+++ b/meta-ampere/meta-mitchell/recipes-ampere/platform/ampere-platform-init/gpio-lib.sh
@@ -2,8 +2,8 @@
 
 # Configure GPIO as output and set its value
 AST2600_GPIO_BASE=(
-    816
-    780
+    512
+    720
 )
 
 function gpio_configure_output() {