sysreset_mpc83xx: fix mcp83xx -> mpc83xx typo

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index 5e6293a..f09e138 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -119,7 +119,7 @@
 	help
 	  Reboot support for generic x86 processor reset in TPL.
 
-config SYSRESET_MCP83XX
+config SYSRESET_MPC83XX
 	bool "Enable support MPC83xx SoC family reboot driver"
 	help
 	  Reboot support for NXP MPC83xx SoCs.