benchmarks: cleanup footprint tests (nano kernel)

Remove float option from 'max' configuration and add a new
'float' test for hardware that supports floating point.

Move configuration files into directories to ease maintenance.

Change-Id: Ibf4c88ea946a78b8025bc61409b0ab661250f4fb
Signed-off-by: Anas Nashif <anas.nashif@intel.com>

samples/nanokernel/benchmark/footprint/Makefile

@@ -3,9 +3,13 @@ TEST ?= min
 
 KERNEL_TYPE = nano
 BOARD ?= qemu_x86
-CONF_FILE = $(or $(wildcard prj_$(TEST)_$(ARCH)_$(BOARD).conf), \
-                 $(wildcard prj_$(TEST)_$(ARCH).conf))
+CONF_FILE = $(or $(wildcard $(TEST)/$(BOARD).conf), \
+                 $(wildcard $(TEST)/$(ARCH).conf))
+ifeq ($(TEST),float)
+CFLAGS += -DTEST_max
+else
 CFLAGS += -DTEST_$(TEST)
+endif
 
 include $(ZEPHYR_BASE)/Makefile.inc
 

samples/nanokernel/benchmark/footprint/max/x86.conf

@@ -0,0 +1,4 @@
+CONFIG_PRINTK=y
+CONFIG_STDOUT_CONSOLE=y
+CONFIG_IDT_NUM_VECTORS=256
+CONFIG_NUM_DYNAMIC_STUBS=2

samples/nanokernel/benchmark/footprint/testcase.ini

@@ -14,4 +14,10 @@ tags = footprint
 extra_args = TEST=max
 build_only = true
 arch_whitelist = x86
+
+[footprint-float]
+tags = footprint
+extra_args = TEST=float
+build_only = true
+arch_whitelist = x86
 config_whitelist = !CONFIG_CPU_MINUTEIA