patches-7.0: fix malformed SCMI patch

[ClayStan404]

Summary

• restore the missing unified-diff context prefix in the Linux 7.0 SCMI patch
• allow the 7.0 patch series to be parsed and applied by git am

Root cause

Commit 8a220a70 changed device_set_of_node_from_dev() from a removed line to
an unchanged context line, but left the line starting with a tab instead of the
required single-space context prefix. Git therefore reported the mailbox patch
as corrupt before applying it.

Impact

stable-kernel builds using the latest cix-linux-main fail at patch 3 before
kernel configuration or compilation begins.

Validation

• git apply --numstat parses the corrected SCMI patch successfully.
• All 79 patches-7.0 patches apply in order to a fresh Linux 7.0.13 tree.
• The corrected patch passes git apply --check in the failed build tree after
  the first two patches have been applied.