ethtool: Allow enabling/disabling pretty printing

Ethtool has a configure script option allowing the enabling or disabling of
pretty printing for drivers, SFP modules etc which can save a significant
amount of bytes on the root filesystem. Allow selecting that, and turn it on by
default (like ethtool's configure script).

[Peter: fix Config.in indentation/style]
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/ethtool/Config.in

@@ -5,3 +5,11 @@ config BR2_PACKAGE_ETHTOOL
 	  ethernet-based network interface.
 
 	  https://www.kernel.org/pub/software/network/ethtool/
+
+config BR2_PACKAGE_ETHTOOL_PRETTY_PRINT
+	bool "enable pretty printing"
+	default y
+	depends on BR2_PACKAGE_ETHTOOL
+	help
+	  Enables ethtool's pretty printing for drivers
+	  and SFP modules.

package/ethtool/ethtool.mk

@@ -9,5 +9,7 @@ ETHTOOL_SOURCE = ethtool-$(ETHTOOL_VERSION).tar.xz
 ETHTOOL_SITE = $(BR2_KERNEL_MIRROR)/software/network/ethtool
 ETHTOOL_LICENSE = GPL-2.0
 ETHTOOL_LICENSE_FILES = COPYING
+ETHTOOL_CONF_OPTS = \
+	$(if $(BR2_PACKAGE_ETHTOOL_PRETTY_PRINT),--enable-pretty-dump,--disable-pretty-dump)
 
 $(eval $(autotools-package))