tslib: drop redundant configure options

And cleanup while we're at it.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/tslib/tslib.mk

@@ -3,15 +3,10 @@
 # tslib
 #
 #############################################################
-TSLIB_VERSION:=412d99d8b92c
-TSLIB_SITE:=git://github.com/kergoth/tslib.git
+TSLIB_VERSION = 412d99d8b92c
+TSLIB_SITE = git://github.com/kergoth/tslib.git
 TSLIB_AUTORECONF = YES
 TSLIB_INSTALL_STAGING = YES
-TSLIB_INSTALL_TARGET = YES
 TSLIB_INSTALL_STAGING_OPT = DESTDIR=$(STAGING_DIR) LDFLAGS=-L$(STAGING_DIR)/usr/lib install
 
-TSLIB_CONF_OPT = \
-	--prefix=/usr	\
-	--sysconfdir=/etc
-
 $(eval $(call AUTOTARGETS,package,tslib))