bsp: cvitek: fix source command spelling in Kconfig

[Problem Description]
The Kconfig file contained misspelled source commands:
- "osource" instead of "source" for packages config inclusion
- "rsource" instead of "source" for board config inclusion

[Root Cause]
Incorrect source command spelling breaks Kconfig processing:
1. "osource" is not a valid Kconfig command
2. "rsource" is not a valid Kconfig command
3. These typos prevent proper configuration inheritance

[Solution]
Correct the source command spellings:
- Change "osource" to standard "source" for packages
- Change "rsource" to standard "source" for board
- Maintain original configuration hierarchy

Signed-off-by: Liu Gui <[email protected]>

Author: KennethLiu61

bsp/cvitek/c906_little/Kconfig

@@ -7,8 +7,8 @@ RTT_DIR := ../../..
 PKGS_DIR := packages
 
 source "$(RTT_DIR)/Kconfig"
-osource "$PKGS_DIR/Kconfig"
-rsource "board/Kconfig"
+source "$PKGS_DIR/Kconfig"
+source "board/Kconfig"
 
 config BSP_USING_C906_LITTLE
     bool

bsp/cvitek/cv18xx_risc-v/Kconfig

@@ -7,8 +7,8 @@ RTT_DIR := ../../..
 PKGS_DIR := packages
 
 source "$(RTT_DIR)/Kconfig"
-osource "$PKGS_DIR/Kconfig"
-rsource "board/Kconfig"
+source "$PKGS_DIR/Kconfig"
+source "board/Kconfig"
 
 config BSP_USING_CV18XX
     bool