fix some bug

bsp/raspberry-pi/raspi3-32/driver/drv_fb.c

@@ -429,7 +429,7 @@ void print_fb_info()
     rt_kprintf("call mbox:%x,%x,%x,%x,%x\n", mbox[0], mbox[1], mbox[2], mbox[3], mbox[4]);
 }
 
-void hdmi_fb_init()
+int hdmi_fb_init()
 {
     unsigned int *mbox = (unsigned int*) MBOX_ADDR;
     mbox[0] = 35 * 4;
@@ -503,6 +503,7 @@ void hdmi_fb_init()
         _hdmi_info.height = _hdmi.fb.height;
         _hdmi_info.framebuffer = (rt_uint8_t *) _hdmi.fb.addr;
     }
+    return 0;
 }
 
 INIT_DEVICE_EXPORT(hdmi_fb_init);

bsp/raspberry-pi/raspi3-32/driver/drv_fb.h

@@ -55,6 +55,5 @@ struct rt_hdmi_fb_device
 
 fb_t fb_info;
 void print_fb_info();
-void hdmi_fb_init();
 
 #endif/* __DRV_FB_H__ */

bsp/raspberry-pi/raspi3-64/rtconfig.py

@@ -16,9 +16,6 @@ if os.getenv('RTT_CC'):
 PLATFORM    = 'gcc'
 EXEC_PATH   = r'/opt/gcc-arm-8.3-2019.03-x86_64-aarch64-elf/bin/'  
 
-if os.getenv('RTT_EXEC_PATH'):
-    EXEC_PATH = os.getenv('RTT_EXEC_PATH')
-
 BUILD = 'debug'
 
 if PLATFORM == 'gcc':