Fix platform.h for C compilation

Allow platform.h to be used by POC files

Change-Id: I809749422e12f4c4b2c616ca0994b158f3cd054c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4251
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: Adrien Destugues <[email protected]>

headers/private/kernel/boot/platform.h

@@ -43,7 +43,6 @@ extern void platform_switch_to_logo(void);
 extern void platform_switch_to_text_mode(void);
 extern void platform_start_kernel(void);
 extern void platform_exit(void);
-extern void platform_load_ucode(BootVolume& volume);
 
 #ifdef __cplusplus
 }
@@ -63,6 +62,7 @@ extern status_t platform_get_boot_partitions(struct stage2_args *args, Node *boo
 					NodeList *partitions, NodeList *bootPartitions);
 extern status_t platform_register_boot_device(Node *device);
 extern void platform_cleanup_devices();
+extern void platform_load_ucode(BootVolume& volume);
 
 /* menu functions */
 

src/system/boot/platform/amiga_m68k/cpu.cpp

@@ -106,7 +106,7 @@ cpu_init()
 }
 
 
-extern "C" void
+void
 platform_load_ucode(BootVolume& volume)
 {
 }

src/system/boot/platform/atari_m68k/cpu.cpp

@@ -131,7 +131,7 @@ cpu_init()
 }
 
 
-extern "C" void
+void
 platform_load_ucode(BootVolume& volume)
 {
 }

src/system/boot/platform/bios_ia32/cpu.cpp

@@ -72,7 +72,7 @@ cpu_init()
 }
 
 
-extern "C" void
+void
 platform_load_ucode(BootVolume& volume)
 {
 	arch_ucode_load(volume);

src/system/boot/platform/efi/cpu.cpp

@@ -48,7 +48,7 @@ cpu_init()
 }
 
 
-extern "C" void
+void
 platform_load_ucode(BootVolume& volume)
 {
 	arch_ucode_load(volume);

src/system/boot/platform/next_m68k/cpu.cpp

@@ -87,7 +87,7 @@ cpu_init()
 }
 
 
-extern "C" void
+void
 platform_load_ucode(BootVolume& volume)
 {
 }

src/system/boot/platform/openfirmware/cpu.cpp

@@ -7,7 +7,7 @@
 #include <boot/platform.h>
 
 
-extern "C" void
+void
 platform_load_ucode(BootVolume& volume)
 {
 }

src/system/boot/platform/riscv/cpu.cpp

@@ -42,7 +42,7 @@ cpu_init()
 }
 
 
-extern "C" void
+void
 platform_load_ucode(BootVolume& volume)
 {
 	// we have no ucode

src/system/boot/platform/u-boot/cpu.cpp

@@ -37,7 +37,7 @@ cpu_init()
 }
 
 
-extern "C" void
+void
 platform_load_ucode(BootVolume& volume)
 {
 }