tools: PCI: Fix installation when `make tools/pci_install`

The commit c9a70787 ("tools pci: Do not delete pcitest.sh in 'make clean'")
fixed a `make tools clean` issue and simultaneously brought a regression
to the installation process:

  for script in .../tools/pci/pcitest.sh; do	\
	install $script .../usr/usr/bin;	\
  done
  install: cannot stat '.../tools/pci/pcitest.sh': No such file or directory

Update the install commands to fix the remaining issue.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Jean-Jacques Hiblot <jjhiblot@ti.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/pci/Makefile

@@ -18,7 +18,6 @@ ALL_TARGETS := pcitest
 ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
 
 SCRIPTS := pcitest.sh
-ALL_SCRIPTS := $(patsubst %,$(OUTPUT)%,$(SCRIPTS))
 
 all: $(ALL_PROGRAMS)
 
@@ -47,10 +46,10 @@ clean:
 
 install: $(ALL_PROGRAMS)
 	install -d -m 755 $(DESTDIR)$(bindir);		\
-	for program in $(ALL_PROGRAMS) pcitest.sh; do	\
+	for program in $(ALL_PROGRAMS); do		\
 		install $$program $(DESTDIR)$(bindir);	\
 	done;						\
-	for script in $(ALL_SCRIPTS); do		\
+	for script in $(SCRIPTS); do			\
 		install $$script $(DESTDIR)$(bindir);	\
 	done