[PATCH 36/52] m68k: q40: Add and use "q40.h"

[Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>]

When building with W=1:

    arch/m68k/q40/q40ints.c:84:13: warning: no previous prototype for ‘q40_init_IRQ’ [-Wmissing-prototypes]
       84 | void __init q40_init_IRQ(void)
	  |             ^~~~~~~~~~~~
    arch/m68k/q40/q40ints.c:112:6: warning: no previous prototype for ‘q40_mksound’ [-Wmissing-prototypes]
      112 | void q40_mksound(unsigned int hz, unsigned int ticks)
	  |      ^~~~~~~~~~~
    arch/m68k/q40/q40ints.c:152:6: warning: no previous prototype for ‘q40_sched_init’ [-Wmissing-prototypes]
      152 | void q40_sched_init (void)
	  |      ^~~~~~~~~~~~~~

Fix this by introducing a new header file "q40.h" for holding the
prototypes of functions implemented in arch/m68k/q40/.

Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
 arch/m68k/q40/config.c  | 6 ++----
 arch/m68k/q40/q40.h     | 6 ++++++
 arch/m68k/q40/q40ints.c | 2 ++
 3 files changed, 10 insertions(+), 4 deletions(-)
 create mode 100644 arch/m68k/q40/q40.h

diff --git a/arch/m68k/q40/config.c b/arch/m68k/q40/config.c
index c78ee709b45879c7..2c51c2b4a4fbbf79 100644
--- a/arch/m68k/q40/config.c
+++ b/arch/m68k/q40/config.c
@@ -36,16 +36,14 @@
 #include <asm/q40_master.h>
 #include <asm/config.h>
 
-extern void q40_init_IRQ(void);
+#include "q40.h"
+
 static void q40_get_model(char *model);
-extern void q40_sched_init(void);
 
 static int q40_hwclk(int, struct rtc_time *);
 static int q40_get_rtc_pll(struct rtc_pll_info *pll);
 static int q40_set_rtc_pll(struct rtc_pll_info *pll);
 
-extern void q40_mksound(unsigned int /*freq*/, unsigned int /*ticks*/);
-
 static void q40_mem_console_write(struct console *co, const char *b,
 				  unsigned int count);
 
diff --git a/arch/m68k/q40/q40.h b/arch/m68k/q40/q40.h
new file mode 100644
index 0000000000000000..3146679bde0dab97
--- /dev/null
+++ b/arch/m68k/q40/q40.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* q40ints.c */
+void q40_init_IRQ(void);
+void q40_mksound(unsigned int hz, unsigned int ticks);
+void q40_sched_init(void);
diff --git a/arch/m68k/q40/q40ints.c b/arch/m68k/q40/q40ints.c
index 127d7ecdbd49ecd9..10f1f294e91f9705 100644
--- a/arch/m68k/q40/q40ints.c
+++ b/arch/m68k/q40/q40ints.c
@@ -24,6 +24,8 @@
 #include <asm/q40_master.h>
 #include <asm/q40ints.h>
 
+#include "q40.h"
+
 /*
  * Q40 IRQs are defined as follows:
  *            3,4,5,6,7,10,11,14,15 : ISA dev IRQs
-- 
2.34.1