configure: corrected issue in Makefile.am and removed noinst build of umax_pp tool

Currently, there is no way to disable the build of the umax_pp low level
sources because the tool umax_pp is *always* built. Some platforms
cannot build the umax_pp low level code so this causes problems.

configure.ac

@@ -650,7 +650,7 @@ ALL_BACKENDS="abaton agfafocus apple artec artec_eplus48u as6e \
         mustek_usb mustek_usb2 nec net niash pie pieusb pint \
         pixma plustek plustek_pp qcam ricoh ricoh2 rts8891 s9036 \
         sceptre sharp sm3600 sm3840 snapscan sp15c st400 \
-        stv680 tamarack teco1 teco2 teco3 test u12 umax
+        stv680 tamarack teco1 teco2 teco3 test u12 umax \
         umax_pp umax1220u v4l xerox_mfp p5"
 
 # If user specifies backends manually then cause configure

tools/Makefile.am

@@ -11,8 +11,6 @@ bin_PROGRAMS = sane-find-scanner gamma4scanimage
 noinst_PROGRAMS = sane-desc
 if INSTALL_UMAX_PP_TOOLS
 bin_PROGRAMS += umax_pp
-else
-noinst_PROGRAMS += umax_pp
 endif
 
 if CROSS_COMPILING