powerpc/chrp: Make hydra_init() static

Commit 407d418f2fd4c20a ("powerpc/chrp: Move PHB discovery") moved the
sole call to hydra_init() to the source file where it is defined, so it
can be made static.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/powerpc/include/asm/hydra.h

···
 #define HYDRA_INT_EXT7		18	/* Power Off Request */
 #define HYDRA_INT_SPARE		19
 
-extern int hydra_init(void);
-
 #endif /* __KERNEL__ */
 
 #endif /* _ASMPPC_HYDRA_H */

arch/powerpc/platforms/chrp/pci.c

···
 
 volatile struct Hydra __iomem *Hydra = NULL;
 
-int __init
-hydra_init(void)
+static int __init hydra_init(void)
 {
 	struct device_node *np;
 	struct resource r;