include: Rename ipi_inject() to ipi_send() for sbi_platform

For better naming, we rename ipi_inject() to ipi_send() in
struct sbi_platform. We also replace term "inject" with
"send" in all related places.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

platform/common/include/plat/sys/clint.h

@@ -12,7 +12,7 @@
 
 #include <sbi/sbi_types.h>
 
-void clint_ipi_inject(u32 target_hart);
+void clint_ipi_send(u32 target_hart);
 
 void clint_ipi_sync(u32 target_hart);