sysreset_mpc83xx: fix mcp83xx -> mpc83xx typo

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
diff --git a/configs/gazerbeam_defconfig b/configs/gazerbeam_defconfig
index 683fc22..33ddd6d 100644
--- a/configs/gazerbeam_defconfig
+++ b/configs/gazerbeam_defconfig
@@ -186,7 +186,7 @@
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
 CONFIG_SYSRESET=y
-CONFIG_SYSRESET_MCP83XX=y
+CONFIG_SYSRESET_MPC83XX=y
 CONFIG_TIMER=y
 CONFIG_MPC83XX_TIMER=y
 CONFIG_TPM_ATMEL_TWI=y