[xen stable-4.17] rombios: Remove the use of egrep

[patchbot@xxxxxxx]

commit e418a77295e6b512d212b57123c11e4d4fb23e8c
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Aug 18 11:05:00 2023 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Tue Aug 22 13:43:05 2023 +0100

    rombios: Remove the use of egrep
    
    As the Alpine 3.18 container notes:
    
      egrep: warning: egrep is obsolescent; using grep -E
    
    Adjust it.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    (cherry picked from commit 5ddac3c2852ecc120acab86fc403153a2097c5dc)
---
 tools/firmware/rombios/32bit/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/firmware/rombios/32bit/Makefile 
b/tools/firmware/rombios/32bit/Makefile
index c058c71551..50d45647c2 100644
--- a/tools/firmware/rombios/32bit/Makefile
+++ b/tools/firmware/rombios/32bit/Makefile
@@ -26,7 +26,7 @@ $(TARGET): 32bitbios_all.o
 32bitbios_all.o: 32bitbios.o tcgbios/tcgbiosext.o util.o pmm.o
        $(LD) $(LDFLAGS_DIRECT) -s -r $^ -o 32bitbios_all.o
        @nm 32bitbios_all.o |                                \
-         egrep '^ +U ' >/dev/null && {                      \
+         grep -E '^ +U ' >/dev/null && {                    \
            echo "There are undefined symbols in the BIOS:"; \
            nm -u 32bitbios_all.o;                           \
            exit 11;                                         \
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.17