sh: define entry point and reloc_dst inside a linker script

No functional change, concentrate linker script commands in one
place for convenience. Entry point is set to CONFIG_SYS_TEXT_BASE by
default on build, so this option can be omitted from being added to
the linker script.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sh/cpu/u-boot.lds b/arch/sh/cpu/u-boot.lds
index e90ac06..bc240bd 100644
--- a/arch/sh/cpu/u-boot.lds
+++ b/arch/sh/cpu/u-boot.lds
@@ -19,10 +19,7 @@
 
 SECTIONS
 {
-	/*
-	 * entry and reloct_dst will be provided via ldflags
-	 */
-	. = .;
+	reloc_dst = .;
 
 	PROVIDE (_ftext = .);
 	PROVIDE (_fcode = .);
@@ -73,7 +70,6 @@
 
 	PROVIDE (__init_end = .);
 	PROVIDE (reloc_dst_end = .);
-	/* _reloc_dst_end = .; */
 
 	PROVIDE (bss_start = .);
 	PROVIDE (__bss_start = .);