meta-ampere: mtjade: Fix SCP failover handling

"BMC_I2C_BACKUP_SEL" was not defined anywhere, so script
"ampere_scp_failover.sh" fails to execute and SCP can't
switch to the secondary EEPROM to boot in case of failed
primary EEPROM firmware.

This commit defines BMC_I2C_BACKUP_SEL to 8 in "gpio-defs.sh"
, which is gpio B0

Tested:

1. BMC on, Host on, flash good SCP firmware to secondary EEPROM,
flash bad SCP firmware to primary EEPROM that simulate SCP
authentication failure
	=> Host boots OK with secondary EEPROM
   Check gpio BMC_I2C_BACKUP_SEL
	=> it will be set to 0

Signed-off-by: chaul.ampere <chaul@amperecomputing.com>
Change-Id: Ibb891042deb051f8100f9a88dd3619bce12c181f
diff --git a/meta-ampere/meta-jade/recipes-ampere/platform/ampere-utils/gpio-defs.sh b/meta-ampere/meta-jade/recipes-ampere/platform/ampere-utils/gpio-defs.sh
index fc0edd6..e0a7c02 100644
--- a/meta-ampere/meta-jade/recipes-ampere/platform/ampere-utils/gpio-defs.sh
+++ b/meta-ampere/meta-jade/recipes-ampere/platform/ampere-utils/gpio-defs.sh
@@ -18,6 +18,7 @@
 
 
 ### Table 1: GPIO Assignments
+BMC_I2C_BACKUP_SEL=8
 S0_CPU_FW_BOOT_OK=48
 CPU_BMC_OVERTEMP_L=51
 CPU_BMC_HIGHTEMP_L=72
diff --git a/meta-ampere/meta-jade/recipes-phosphor/gpio/ampere-gpio-handling/ampere_scp_failover.sh b/meta-ampere/meta-jade/recipes-phosphor/gpio/ampere-gpio-handling/ampere_scp_failover.sh
index 56319a3..c1c16ab 100644
--- a/meta-ampere/meta-jade/recipes-phosphor/gpio/ampere-gpio-handling/ampere_scp_failover.sh
+++ b/meta-ampere/meta-jade/recipes-phosphor/gpio/ampere-gpio-handling/ampere_scp_failover.sh
@@ -7,6 +7,8 @@
 #   and logs an event in SEL.
 
 # shellcheck disable=SC1091
+# shellcheck disable=SC2046
+
 source /usr/sbin/gpio-lib.sh
 source /usr/sbin/gpio-defs.sh
 
@@ -16,7 +18,7 @@
 	# If it is HIGH, set it LOW. Then reset the Host to boot from
 	# the failover Boot EEPROM.
 	echo "scp-failover: switch HOST to failover boot EEPROM"
-	gpioset "$(gpiofind BMC_SELECT_EEPROM)"=0
+	gpioset $(gpiofind BMC_SELECT_EEPROM)=0
 
 	# Reset the Host to boot on the failover EEPROM
 	ampere_power_util.sh mb force_reset
@@ -25,7 +27,7 @@
 	obmcutil chassisoff
 
 	echo "scp-failover: switch HOST back to the main Boot EEPROM"
-	gpioset "$(gpiofind BMC_SELECT_EEPROM)"=1
+	gpioset $(gpiofind BMC_SELECT_EEPROM)=1
 
 	# Log event
 	ampere_add_redfishevent.sh OpenBMC.0.1.GeneralFirmwareSecurityViolation.Critical "SCP Authentication failure"