bl32: use SORT_BY_ALIGNMENT macro in sp_min.ld.S

The macro SORT_BY_ALIGNMENT is used for .text* and .rodata*. This allows
reducing the space lost to object alignment. This is an alignment with
the following patch:
ebd6efae67

Some comments are also aligned with other linker scripts.

Change-Id: I2ea59edb445af0ed8c08fd883ffbf56852570d0c
Signed-off-by: Yann Gautier <yann.gautier@st.com>

bl32/sp_min/sp_min.ld.S

@@ -29,7 +29,7 @@ SECTIONS
     .text . : {
         __TEXT_START__ = .;
         *entrypoint.o(.text*)
-        *(.text*)
+        *(SORT_BY_ALIGNMENT(.text*))
         *(.vectors)
         . = ALIGN(PAGE_SIZE);
         __TEXT_END__ = .;
@@ -46,7 +46,7 @@ SECTIONS
 
     .rodata . : {
         __RODATA_START__ = .;
-        *(.rodata*)
+        *(SORT_BY_ALIGNMENT(.rodata*))
 
 	RODATA_COMMON
 
@@ -61,8 +61,8 @@ SECTIONS
     ro . : {
         __RO_START__ = .;
         *entrypoint.o(.text*)
-        *(.text*)
+        *(SORT_BY_ALIGNMENT(.text*))
-        *(.rodata*)
+        *(SORT_BY_ALIGNMENT(.rodata*))
 
 	RODATA_COMMON
 
@@ -76,7 +76,7 @@ SECTIONS
         /*
          * Memory page(s) mapped to this section will be marked as
          * read-only, executable.  No RW data from the next section must
-         * creep in.  Ensure the rest of the current memory block is unused.
+         * creep in.  Ensure the rest of the current memory page is unused.
          */
         . = ALIGN(PAGE_SIZE);
         __RO_END__ = .;
@@ -134,7 +134,7 @@ SECTIONS
 #endif
 
     /*
-     * Define a linker symbol to mark end of the RW memory area for this
+     * Define a linker symbol to mark the end of the RW memory area for this
      * image.
      */
     __RW_END__ = .;