arm64: zynqmp: Move PANIC to Kconfig

Convert another option Kconfig.

Reported-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_zynqmp_mini_nand_single_defconfig b/configs/xilinx_zynqmp_mini_nand_single_defconfig
index 21aafe1..20e76cb 100644
--- a/configs/xilinx_zynqmp_mini_nand_single_defconfig
+++ b/configs/xilinx_zynqmp_mini_nand_single_defconfig
@@ -50,4 +50,5 @@
 CONFIG_MTD=y
 CONFIG_MTD_RAW_NAND=y
 CONFIG_NAND_ARASAN=y
+CONFIG_PANIC_HANG=y
 # CONFIG_EFI_LOADER is not set