package/spidev_test: fix version depending on kernel headers version

Fixes:

  - http://autobuild.buildroot.net/results/a5c008aaff40f4851ffa36439c7340b6243a4842

  .../build/spidev_test-5.8/spidev_test.c:132:13: error: 'SPI_TX_OCTAL' undeclared (first use in this function); did you mean 'SPI_TX_DUAL'?
    132 |  if (mode & SPI_TX_OCTAL)
        |             ^~~~~~~~~~~~
        |             SPI_TX_DUAL

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/spidev_test/Config.in

@@ -9,7 +9,7 @@ config BR2_PACKAGE_SPIDEV_TEST
 	  proper operation of 'spidev_test'.
 
 	  The version used is based on your toolchain headers version,
-	  if it's older than 3.15 then 3.0 is used, up to headers 4.20
+	  if it's older than 3.15 then 3.0 is used, up to headers 5.7
 	  version 4.10 is used and otherwise version 5.8.
 	  This means you won't have quad-pumped SPI support if your
 	  toolchain is too old.

package/spidev_test/spidev_test.mk

@@ -10,7 +10,7 @@
 # If you need quad-pumped spi support you need to upgrade your toolchain.
 # Note that the location of spidev_test.c changes from v4.5 onwards.
 
-ifeq ($(BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_0),y)
+ifeq ($(BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_8),y)
 SPIDEV_TEST_VERSION = 5.8
 SPIDEV_TEST_PATH = tools/spi
 else ifeq ($(BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15),y)