[openwrt/openwrt] ltq-deu: fix 6.12 kernel build warnings on lantiq/xway

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/fdc2d8d07bbddec698823816cb0cfc88f7df7fa2

commit fdc2d8d07bbddec698823816cb0cfc88f7df7fa2
Author: Shiji Yang <yangshiji66 at outlook.com>
AuthorDate: Sat May 10 17:19:18 2025 +0800

    ltq-deu: fix 6.12 kernel build warnings on lantiq/xway
    
    This patch fixes the following build warnings by adding
    missing prototypes:
    
    /home/db/owrt/build_dir/target-mips_24kc_musl/linux-lantiq_xway/ltq-deu-danube/ltq-deu/ifxmips_deu_danube.c:100:5: error: no previous prototype for 'input_swap' [-Werror=missing-prototypes]
      100 | u32 input_swap(u32 input)
          |     ^~~~~~~~~~
    /home/db/owrt/build_dir/target-mips_24kc_musl/linux-lantiq_xway/ltq-deu-ar9/ltq-deu/ifxmips_deu_ar9.c:91:5: error: no previous prototype for 'input_swap' [-Werror=missing-prototypes]
       91 | u32 input_swap(u32 input)
          |     ^~~~~~~~~~
    /home/db/owrt/build_dir/target-mips_24kc_musl/linux-lantiq_xway/ltq-deu-ar9/ltq-deu/ifxmips_deu_ar9.c:131:6: error: no previous prototype for 'chip_version' [-Werror=missing-prototypes]
      131 | void chip_version(void)
          |      ^~~~~~~~~~~~
    
    Signed-off-by: Shiji Yang <yangshiji66 at outlook.com>
    Link: https://github.com/openwrt/openwrt/pull/18744
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 package/kernel/lantiq/ltq-deu/src/ifxmips_deu_ar9.h    | 3 +++
 package/kernel/lantiq/ltq-deu/src/ifxmips_deu_danube.h | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_ar9.h b/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_ar9.h
index 2f373589a5..324d20012b 100644
--- a/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_ar9.h
+++ b/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_ar9.h
@@ -304,4 +304,7 @@ struct deu_dma_t {
 	} controlr;
 };
 
+u32 input_swap(u32 input);
+void chip_version(void);
+
 #endif /* IFXMIPS_DEU_AR9_H */
diff --git a/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_danube.h b/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_danube.h
index 25561cf6e0..eb2f749bb3 100644
--- a/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_danube.h
+++ b/package/kernel/lantiq/ltq-deu/src/ifxmips_deu_danube.h
@@ -255,4 +255,6 @@ struct deu_dma_t {
 	} controlr;
 };
 
+u32 input_swap(u32 input);
+
 #endif  /* IFXMIPS_DEU_DANUBE_H */