plotter: Allow drawstyle to be forwarded to matplotlib
plotter: Allow drawstyle to be forwarded to matplotlib

Change-Id: I2ec1a521716b21cb1a99668f2353d580d7490fc9
Signed-off-by: Kapileshwar Singh <d373e2b6407ea84be359ce4a11e8631121819e79@arm.com>

sinkap/trappy,derkling/trappy,joelagnel/trappy,joelagnel/trappy,JaviMerino/trappy,ARM-software/trappy,sinkap/trappy,bjackman/trappy,bjackman/trappy,ARM-software/trappy,bjackman/trappy,derkling/trappy,bjackman/trappy,ARM-software/trappy,joelagnel/trappy,derkling/trappy,JaviMerino/trappy,JaviMerino/trappy,joelagnel/trappy,sinkap/trappy,sinkap/trappy,ARM-software/trappy