doc: replace @return by Return:

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/arch/x86/include/asm/mtrr.h b/arch/x86/include/asm/mtrr.h
index d1aa86b..ca2edc7 100644
--- a/arch/x86/include/asm/mtrr.h
+++ b/arch/x86/include/asm/mtrr.h
@@ -145,7 +145,7 @@
  * @type:	Requested type (MTRR_TYPE_)
  * @start:	Start address
  * @size:	Size, must be power of 2
- * @return 0 on success, -EINVAL if size is not power of 2,
+ * Return: 0 on success, -EINVAL if size is not power of 2,
  * -ENOSPC if there are no more MTRRs
  */
 int mtrr_set_next_var(uint type, uint64_t base, uint64_t size);
@@ -166,7 +166,7 @@
  * @cpu_select: Selected CPUs (either a CPU number or MP_SELECT_...)
  * @reg: MTRR register to write (0-7)
  * @valid: Valid flag to write
- * @return 0 on success, -ve on error
+ * Return: 0 on success, -ve on error
  */
 int mtrr_set_valid(int cpu_select, int reg, bool valid);
 
@@ -177,7 +177,7 @@
  * @reg: MTRR register to write (0-7)
  * @base: Base address and MTRR_BASE_TYPE_MASK
  * @mask: Mask and MTRR_PHYS_MASK_VALID
- * @return 0 on success, -ve on error
+ * Return: 0 on success, -ve on error
  */
 int mtrr_set(int cpu_select, int reg, u64 base, u64 mask);
 
@@ -186,7 +186,7 @@
  *
  * Some CPUs have more than 8 MTRRs. This function returns the actual number
  *
- * @return number of variable MTRRs
+ * Return: number of variable MTRRs
  */
 int mtrr_get_var_count(void);