docs(linux): U-Boot: Falcon-Mode: fix OSPI section

The OSPI section wasn't properly enumerated as '3.1.1.11.2.1' as first
the subsection under 'Extra Configuration'.

This patch moves the ifconfig guards to inside of the subsection header
so it's parsed properly.

Signed-off-by: Anshul Dalal <anshuld@ti.com>

Author: ArchUsr64

source/linux/Foundational_Components/U-Boot/UG-Falcon-Mode.rst

@@ -68,10 +68,10 @@ authenticating on the R5 core.
 Extra Configuration
 *******************
 
-.. ifconfig:: CONFIG_part_variant not in ('AM62AX')
+OSPI boot:
+==========
 
-   OSPI boot:
-   ==========
+.. ifconfig:: CONFIG_part_variant not in ('AM62AX')
 
    For OSPI boot, the ``tiboot3.bin`` and ``tifalcon.bin`` files should be
    flashed to the same addresses in flash as regular boot flow but the DTB and
@@ -83,11 +83,15 @@ Extra Configuration
 
    .. code-block:: console
 
-      => sf probe
-      => tftp ${loadaddr} tiboot3.bin
-      => sf update $loadaddr 0x0 $filesize
-      => tftp ${loadaddr} tifalcon.bin
-      => sf update $loadaddr 0x80000 $filesize
+     => sf probe
+     => tftp ${loadaddr} tiboot3.bin
+     => sf update $loadaddr 0x0 $filesize
+     => tftp ${loadaddr} tifalcon.bin
+     => sf update $loadaddr 0x80000 $filesize
+
+.. ifconfig:: CONFIG_part_variant in ('AM62AX')
+
+   This section is not applicable for this platform.
 
 eMMC Boot:
 ==========