[qsd8k] Add code to support Scorpion warm boot in lk bootloader

Before going into power collapse, the kernel does not change the reset
vector, so execution resumes at bootloader.  Add check in bootloader
to detect warm boot v/s cold boot and if warm boot is detected then
jump to kernel after doing cpu early initializations.
diff --git a/platform/qsd8k/rules.mk b/platform/qsd8k/rules.mk
index 1a8f2ef..237c469 100644
--- a/platform/qsd8k/rules.mk
+++ b/platform/qsd8k/rules.mk
@@ -5,7 +5,7 @@
 #arm1136j-s
 CPU := generic
 
-DEFINES += WITH_CPU_EARLY_INIT=1 MEMBASE=0
+DEFINES += WITH_CPU_EARLY_INIT=1 WITH_CPU_WARM_BOOT=1 MEMBASE=0
 
 INCLUDES += -I$(LOCAL_DIR)/include