powerpc/fsl_booke: Make calc_cam_sz() static

calc_cam_sz() is used only in fsl_book3e.c, make it static.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/a7469848371b2cf5e8f654ec79800e209d88595e.1660919200.git.christophe.leroy@csgroup.eu

arch/powerpc/mm/mmu_decl.h

@@ -122,8 +122,6 @@ unsigned long mmu_mapin_ram(unsigned long base, unsigned long top);
 #ifdef CONFIG_PPC_FSL_BOOK3E
 extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx,
 				     bool dryrun, bool init);
-extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
-				 phys_addr_t phys);
 #ifdef CONFIG_PPC32
 extern void adjust_total_lowmem(void);
 extern int switch_to_as1(void);

arch/powerpc/mm/nohash/fsl_book3e.c

@@ -135,8 +135,8 @@ static void settlbcam(int index, unsigned long virt, phys_addr_t phys,
 	tlbcam_addrs[index].phys = phys;
 }
 
-unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
-			  phys_addr_t phys)
+static unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
+				 phys_addr_t phys)
 {
 	unsigned int camsize = __ilog2(ram);
 	unsigned int align = __ffs(virt | phys);