spi: Fix Kconfig warning

This commit moves the ARCH_HAVE_SPI options outside the check
for SPI. Those options don't depend on SPI, and Kconfig files
in arch/ enable them even if SPI isn't enabled.

Sourcing the driver's Kconfig in drivers/Kconfig only if
support for the driver is enabled prevents us from defining
these ARCH_HAVE options in the driver's Kconfig. We should
probably remove the other checks in drivers/Kconfig and check
if the drivers are enabled only in their Kconfig.

drivers/Kconfig

@@ -345,9 +345,7 @@ menuconfig SPI
 		should be enabled by all platforms that support SPI interfaces.
 		See include/nuttx/spi/spi.h for further SPI driver information.
 
-if SPI
 source drivers/spi/Kconfig
-endif
 
 menuconfig I2S
 	bool "I2S Driver Support"

drivers/spi/Kconfig

@@ -3,6 +3,18 @@
 # see the file kconfig-language.txt in the NuttX tools repository.
 #
 
+config ARCH_HAVE_SPI_CRCGENERATION
+	bool
+	default n
+
+config ARCH_HAVE_SPI_CS_CONTROL
+	bool
+	default n
+
+config ARCH_HAVE_SPI_BITORDER
+	bool
+	default n
+
 if SPI
 
 config SPI_SLAVE
@@ -55,10 +67,6 @@ config SPI_HWFEATURES
 		basically the OR of any specific hardware feature and eanbles
 		the SPI hwfeatures() interface method.
 
-config ARCH_HAVE_SPI_CRCGENERATION
-	bool
-	default n
-
 config SPI_CRCGENERATION
 	bool
 	default n
@@ -69,10 +77,6 @@ config SPI_CRCGENERATION
 		generation of SPI CRCs.  Enables the HWFEAT_CRCGENERATION option
 		as well as the hwfeartures() interface method.
 
-config ARCH_HAVE_SPI_CS_CONTROL
-	bool
-	default n
-
 config SPI_CS_CONTROL
 	bool "SPI CS Behavior Control"
 	default n
@@ -82,10 +86,6 @@ config SPI_CS_CONTROL
 		Enables possibilities to define the behavior of CS.
 		Also enables the hwfeatures() interface method.
 
-config ARCH_HAVE_SPI_BITORDER
-	bool
-	default n
-
 config SPI_BITORDER
 	bool "SPI Bit Order Control"
 	default n