Kiwi doesn't support EFI with grub2 on armv7 today. However, we do have at
least one platform (HIP04D01) that needs this configuration.

I've quickly assembled the patch below and am testing it now to check whether I
managed to catch all cases:

diff --git a/modules/KIWIBoot.pm b/modules/KIWIBoot.pm
index c2dc49e..0c3638e 100644
--- a/modules/KIWIBoot.pm
+++ b/modules/KIWIBoot.pm
@@ -3447,6 +3447,9 @@ sub setupBootLoaderStages {
         } elsif (($arch eq 'aarch64') || ($arch eq 'arm64')) {
             $efipc = 'arm64-efi';
             $grubpc = 'arm64-efi';
+        } elsif ($arch =~ /arm/) {
+            $efipc = 'arm-efi';
+            $grubpc = 'arm-efi';
         } elsif ($arch =~ /ppc|ppc64|ppc64le/) {
             if ($firmware eq 'ofw') {
                 $grubofw = 'powerpc-ieee1275';
@@ -3772,6 +3775,9 @@ sub setupBootLoaderStages {
             } elsif (($arch eq 'aarch64') || ($arch eq 'arm64')) {
                 $fo     = 'arm64-efi';
                 $fo_bin = 'bootaa64.efi';
+            } elsif ($arch =~ /arm/) {
+                $fo     = 'arm-efi';
+                $fo_bin = 'bootarm.efi';
             }
             my $core= "$tmpdir/EFI/BOOT/$fo_bin";
             my $core_opts;
@@ -3805,6 +3811,8 @@ sub setupBootLoaderStages {
                 $fo_bin = 'bootx32.efi';
             } elsif (($arch eq 'aarch64') || ($arch eq 'arm64')) {
                 $fo_bin = 'bootaa64.efi';
+            } elsif ($arch =~ /arm/) {
+                $fo_bin = 'bootarm.efi';
             }
             $result = 0;
             if ($zipped) {
@@ -4406,6 +4414,8 @@ sub setupBootLoaderConfiguration {
                         print $FD "\t"."chainloader $prefix/bootx32.efi"."\n";
                     } elsif (($arch eq 'aarch64') || ($arch eq 'arm64')) {
                         print $FD "\t"."chainloader
$prefix/bootaa64.efi"."\n";
+                    } elsif ($arch =~ /arm/) {
+                        print $FD "\t"."chainloader $prefix/bootarm.efi"."\n";
                     }
                 } else {
                     print $FD "\t"."set root='hd0'"."\n";