asm: Consistently uppercase SECTION markers

libavcodec/x86/dnxhdenc.asm

@@ -22,7 +22,7 @@
 
 %include "libavutil/x86/x86util.asm"
 
-section .text
+SECTION .text
 
 ; void get_pixels_8x4_sym_sse2(int16_t *block, const uint8_t *pixels,
 ;                              ptrdiff_t line_size)

libavcodec/x86/hevc_idct.asm

@@ -234,7 +234,7 @@ times 4 dw 78, -82
 times 4 dw 85, -88
 times 4 dw 90, -90
 
-section .text
+SECTION .text
 
 ; void ff_hevc_idctHxW_dc_{8,10}_<opt>(int16_t *coeffs)
 ; %1 = HxW

libavcodec/x86/vc1dsp.asm

@@ -24,7 +24,7 @@
 cextern pw_4
 cextern pw_5
 
-section .text
+SECTION .text
 
 ; dst_low, dst_high (src), zero
 ; zero-extends one vector from 8 to 16 bits

libavutil/x86/x86inc.asm

@@ -87,7 +87,7 @@
 ; keep supporting OS/2.
 %macro SECTION_RODATA 0-1 16
     %ifidn __OUTPUT_FORMAT__,aout
-        section .text
+        SECTION .text
     %else
         SECTION .rodata align=%1
     %endif