12312 fix unused lib dependencies

*** 21,31 ****
  #
  #
  # Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
! # cmd/picl/plugins/common/memcfg/Makefile
  #
  LIBRARY=        libpiclmemcfg.a
  VERS=           .1
  
  OBJECTS=        piclmemcfg_comm.o
--- 21,31 ----
  #
  #
  # Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
! # Copyright 2020 Joyent, Inc.
  #
  LIBRARY=        libpiclmemcfg.a
  VERS=           .1
  
  OBJECTS=        piclmemcfg_comm.o
*** 44,60 ****
  CLEANFILES=     $(LINTOUT) $(LINTLIB)
  
  CPPFLAGS +=     -I$(SRC)/uts/sun4u/sys -I$(SRC)/cmd/picl/plugins/common/memcfg
  CFLAGS +=       $(CCVERBOSE) $(C_PICFLAGS)
  
! LDLIBS +=       -L$(SRC)/lib/libpicltree/$(MACH)
! LDLIBS +=       -L../devtree
! LDLIBS +=       -L$(ROOT)/usr/lib/picl/plugins
! LDLIBS +=       -lc -lpicltree -lpicldevtree -lnvpair
! $(SPARC_BLD)LDLIBS +=   -R/usr/platform/\$$PLATFORM/lib/picl/plugins \
!                         -R/usr/platform/sun4u/lib/picl/plugins
! LDLIBS +=       -R/usr/lib/picl/plugins
  
  CLOBBERFILES += $(LIBLINKS)
  
  .KEEP_STATE:
  
--- 44,54 ----
  CLEANFILES=     $(LINTOUT) $(LINTLIB)
  
  CPPFLAGS +=     -I$(SRC)/uts/sun4u/sys -I$(SRC)/cmd/picl/plugins/common/memcfg
  CFLAGS +=       $(CCVERBOSE) $(C_PICFLAGS)
  
! LDLIBS +=       -lc -lpicltree -lnvpair
  
  CLOBBERFILES += $(LIBLINKS)
  
  .KEEP_STATE: