x86/platform/uv: Use str_enabled_disabled() in uv_nmi_setup_hubless_intr()

x86/platform/uv: Use str_enabled_disabled() in uv_nmi_setup_hubless_intr()

Replace hard-coded strings with the str_enabled_disabled() helper. This
unifies the output and helps the linker with deduplication, which can result
in a smaller binary. Additionally, address the following Coccinelle/coccicheck
warning reported by string_choices.cocci:

  opportunity for str_enabled_disabled(uv_pch_intr_now_enabled)

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Kyle Meyer <kyle.meyer@hpe.com>
Link: https://patch.msgid.link/20260504181945.143928-2-thorsten.blum@linux.dev