ARM: reset: use do_reset in SPL/TPL if SYSRESET was not enabled for them

In case CONFIG_SYSRESET is set, do_reset from reset.c will not be available
anywere, even if SYSRESET is disabled for SPL/TPL.

'do_reset' is called from SPL for instance from the panic handler and
PANIC_HANG is not set

Signed-off-by: Claudius Heine <ch@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 8482f54..b839aa7 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -57,7 +57,7 @@
 else
 obj-y	+= interrupts.o
 endif
-ifndef CONFIG_SYSRESET
+ifndef CONFIG_$(SPL_TPL_)SYSRESET
 obj-y	+= reset.o
 endif