Add default arguments for the default programmer (only)

This code exists thanks to food for thought from Urja Rannikko.

Corresponding to flashrom svn r1814.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/Makefile b/Makefile
index 7f7aa92..d3c1ba5 100644
--- a/Makefile
+++ b/Makefile
@@ -52,6 +52,11 @@
 # evaluated below, namely those that enable/disable the various programmers).
 # Compilation will fail for unspecified values.
 CONFIG_DEFAULT_PROGRAMMER ?= PROGRAMMER_INVALID
+# The following adds a default parameter for the default programmer set above (only).
+CONFIG_DEFAULT_PROGRAMMER_ARGS ?= ''
+# Example: compiling with
+#   make CONFIG_DEFAULT_PROGRAMMER=PROGRAMMER_SERPROG CONFIG_DEFAULT_PROGRAMMER_ARGS="dev=/dev/ttyUSB0:1500000"
+# would make executing './flashrom' (almost) equivialent to './flashrom -p serprog:dev=/dev/ttyUSB0:1500000'.
 
 # If your compiler spits out excessive warnings, run make WARNERROR=no
 # You shouldn't have to change this flag.
@@ -487,6 +492,7 @@
 # Depending on the CONFIG_* variables set and verified above we set compiler flags and parameters below.
 
 FEATURE_CFLAGS += -D'CONFIG_DEFAULT_PROGRAMMER=$(CONFIG_DEFAULT_PROGRAMMER)'
+FEATURE_CFLAGS += -D'CONFIG_DEFAULT_PROGRAMMER_ARGS="$(CONFIG_DEFAULT_PROGRAMMER_ARGS)"'
 
 ifeq ($(CONFIG_INTERNAL), yes)
 FEATURE_CFLAGS += -D'CONFIG_INTERNAL=1'