uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/quickemu/input_overrides.patch

@@ -0,0 +1,37 @@
+diff --git a/quickemu b/quickemu
+index 24e1007..39cd5e4 100755
+--- a/quickemu
++++ b/quickemu
+@@ -196,7 +196,7 @@ function efi_vars() {
+ 
+   if [ ! -e "${VARS_OUT}" ]; then
+     if [ -e "${VARS_IN}" ]; then
+-      cp "${VARS_IN}" "${VARS_OUT}"
++      cp "${VARS_IN}" "${VARS_OUT}" && chmod +w "${VARS_OUT}"
+     else
+       echo "ERROR! ${VARS_IN} was not found. Please install edk2."
+       exit 1
+@@ -383,7 +383,10 @@ function vm_boot() {
+     # https://bugzilla.redhat.com/show_bug.cgi?id=1929357#c5
+     case ${secureboot} in
+       on)
+-         if [ -e "/usr/share/OVMF/OVMF_CODE_4M.secboot.fd" ]; then
++        if [[ ${ENV_EFI_CODE_SECURE} && ${ENV_EFI_CODE_SECURE-x} ]] && [[ ${ENV_EFI_VARS_SECURE} && ${ENV_EFI_VARS_SECURE-x} ]]; then
++           EFI_CODE="${ENV_EFI_CODE_SECURE}"
++           efi_vars "${ENV_EFI_VARS_SECURE}" "${EFI_VARS}"
++        elif [ -e "/usr/share/OVMF/OVMF_CODE_4M.secboot.fd" ]; then
+           EFI_CODE="/usr/share/OVMF/OVMF_CODE_4M.secboot.fd"
+           efi_vars "/usr/share/OVMF/OVMF_VARS_4M.fd" "${EFI_VARS}"
+         elif [ -e "/usr/share/edk2/ovmf/OVMF_CODE.secboot.fd" ]; then
+@@ -408,7 +411,10 @@ function vm_boot() {
+         fi
+         ;;
+       *)
+-        if [ -e "/usr/share/OVMF/OVMF_CODE_4M.fd" ]; then
++        if [[ ${ENV_EFI_CODE} && ${ENV_EFI_CODE-x} ]] && [[ ${ENV_EFI_VARS} && ${ENV_EFI_VARS-x} ]]; then
++          EFI_CODE="${ENV_EFI_CODE}"
++          efi_vars "${ENV_EFI_VARS}" "${EFI_VARS}"
++        elif [ -e "/usr/share/OVMF/OVMF_CODE_4M.fd" ]; then
+           EFI_CODE="/usr/share/OVMF/OVMF_CODE_4M.fd"
+           efi_vars "/usr/share/OVMF/OVMF_VARS_4M.fd" "${EFI_VARS}"
+         elif [ -e "/usr/share/edk2/ovmf/OVMF_CODE.fd" ]; then