powerpc/ftrace: Remove nops after the call to ftrace_stub

ftrace_stub is within the same CU, so there is no need for a subsequent
nop instruction.
Signed-off-by: Naveen N Rao <naveen@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/8ee5ec520e37d5523654bb2cd65a17512fb774e2.1702045299.git.naveen@kernel.org

arch/powerpc/kernel/trace/ftrace_entry.S

@@ -162,7 +162,6 @@ _GLOBAL(ftrace_regs_caller)
 .globl ftrace_regs_call
 ftrace_regs_call:
 	bl	ftrace_stub
-	nop
 	ftrace_regs_exit 1
 
 _GLOBAL(ftrace_caller)
@@ -171,7 +170,6 @@ _GLOBAL(ftrace_caller)
 .globl ftrace_call
 ftrace_call:
 	bl	ftrace_stub
-	nop
 	ftrace_regs_exit 0
 
 _GLOBAL(ftrace_stub)